DELPHI基础开发技巧

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◇[DELPHI]网络邻居复制文件
uses shellapi;
copyfile(pchar('newfile.txt'),pchar('//computername/direction/targer.txt'),false);

◇[DELPHI]产生鼠标拖动效果
通过MouseMove事件、DragOver事件、EndDrag事件实现，例如在PANEL上的LABEL：
var xpanel,ypanel,xlabel,ylabel:integer;
PANEL的MouseMove事件：xpanel:=x;ypanel:=y;
PANEL的DragOver事件：xpanel:=x;ypanel:=y;
LABEL的MouseMove事件：xlabel:=x;ylabel:=y;
LABEL的EndDrag事件：label.left:=xpanel-xlabel;label.top:=ypanel-ylabel;

◇[DELPHI]取得WINDOWS目录
uses shellapi;
var windir:array[0..255] of char;
getwindowsdirectory(windir,sizeof(windir));
或者从注册表中读取，位置：
HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion
SystemRoot键，取得如：C:/WINDOWS

◇[DELPHI]在form或其他容器上画线
var x,y:array [0..50] of integer;
canvas.pen.color:=clred;
canvas.pen.style:=psDash;
form1.canvas.moveto(trunc(x[i]),trunc(y[i]));
form1.canvas.lineto(trunc(x[j]),trunc(y[j]));

◇[DELPHI]字符串列表使用
var tips:tstringlist;
tips:=tstringlist.create;
tips.loadfromfile('filename.txt');
edit1.text:=tips[0];
tips.add('last line addition string');
tips.insert(1,'insert string at NO 2 line');
tips.savetofile('newfile.txt');
tips.free;

◇[DELPHI]简单的剪贴板操作
richedit1.selectall;
richedit1.copytoclipboard;
richedit1.cuttoclipboard;
edit1.pastefromclipboard;

◇[DELPHI]关于文件、目录操作
Chdir('c:/abcdir');转到目录
Mkdir('dirname');建立目录
Rmdir('dirname');删除目录
GetCurrentDir;//取当前目录名，无'/'
Getdir(0,s);//取工作目录名s:='c:/abcdir';
Deletfile('abc.txt');//删除文件
Renamefile('old.txt','new.txt');//文件更名
ExtractFilename(filelistbox1.filename);//取文件名
ExtractFileExt(filelistbox1.filename);//取文件后缀

◇[DELPHI]处理文件属性
attr:=filegetattr(filelistbox1.filename);
if (attr and faReadonly)=faReadonly then ... //只读
if (attr and faSysfile)=faSysfile then ... //系统
if (attr and faArchive)=faArchive then ... //存档
if (attr and faHidden)=faHidden then ... //隐藏

◇[DELPHI]执行程序外文件
WINEXEC//调用可执行文件
winexec('command.com /c copy *.* c:/',SW_Normal);
winexec('start abc.txt');
ShellExecute或ShellExecuteEx//启动文件关联程序
function executefile(const filename,params,defaultDir:string;showCmd:integer):THandle;
ExecuteFile('C:/abc/a.txt','x.abc','c:/abc/',0);
ExecuteFile('http://tingweb.yeah.net','','',0);
ExecuteFile('mailto:[e-mail]','','',0);

◇[DELPHI]取得系统运行的进程名
var hCurrentWindow:HWnd;szText:array[0..254] of char;
begin
hCurrentWindow:=Getwindow(handle,GW_HWndFrist);
while hCurrentWindow <> 0 do
begin
if Getwindowtext(hcurrnetwindow,@sztext,255)>0 then listbox1.items.add(strpas(@sztext));
hCurrentWindow:=Getwindow(hCurrentwindow,GW_HWndNext);
end;
end;

◇[DELPHI]关于汇编的嵌入
Asm End;
可以任意修改EAX、ECX、EDX；不能修改ESI、EDI、ESP、EBP、EBX。

◇[DELPHI]关于类型转换函数
FloatToStr//浮点转字符串
FloatToStrF//带格式的浮点转字符串
IntToHex//整数转16进制
TimeToStr
DateToStr
DateTimeToStr
FmtStr//按指定格式输出字符串
formatDateTime('YYYY-MM-DD,hh-mm-ss',DATE);

◇[DELPHI]字符串的过程和函数
Insert(obj,target,pos);//字符串target插入在pos的位置。如插入结果大于target最大长度，多出字符将被截掉。如Pos在255以外，会产生运行错。例如，st:='Brian'，则Insert（'OK',st,2）会使st变为'BrOKian'。
Delete(st,pos,Num);//从st串中的pos（整型）位置开始删去个数为Num（整型）个字符的子字串。例如，st:='Brian'，则Delete(st,3,2)将变为Brn。
Str(value,st);//将数值value（整型或实型）转换成字符串放在st中。例如，a=2.5E4时，则str(a:10,st)将使st的值为' 25000'。
Val(st,var,code);//把字符串表达式st转换为对应整型或实型数值，存放在var中。St必须是一个表示数值的字符串，并符合数值常数的规则。在转换过程中，如果没有检测出错误，变量code置为0，否则置为第一个出错字符的位置。例如，st:=25.4E3,x是一个实型变量，则val(st,x,code)将使X值为25400，code值为0。
Copy(st.pos.num);//返回st串中一个位置pos（整型）处开始的，含有num（整型）个字符的子串。如果pos大于st字符串的长度，那就会返回一个空串，如果pos在255以外，会引起运行错误。例如，st:='Brian'，则Copy(st,2,2)返回'ri'。
Concat(st1,st2,st3……,stn);//把所有自变量表示出的字符串按所给出的顺序连接起来，并返回连接后的值。如果结果的长度255，将产生运行错误。例如，st1:='Brian',st2:=' ',st3:='Wilfred'，则Concat(st1,st2,st3)返回'Brian Wilfred'。
Length(st);//返回字符串表达式st的长度。例如，st:='Brian'，则Length(st)返回值为5。
Pos(obj,target);//返回字符串obj在目标字符串target的第一次出现的位置，如果target没有匹配的串，Pos函数的返回值为0。例如，target:='Brian Wilfred'，则Pos('Wil',target)的返回值是7，Pos('hurbet',target)的返回值是0。

◇[DELPHI]关于处理注册表
uses Registry;
var reg:Tregistry;
reg:=Tregistry.create;
reg.rootkey:='HKey_Current_User';
reg.openkey('Control Panel/Desktop',false);
reg.WriteString('Title Wallpaper','0');
reg.writeString('Wallpaper',filelistbox1.filename);
reg.closereg;
reg.free;

◇[DELPHI]关于键盘常量名
VK_BACK/VK_TAB/VK_RETURN/VK_SHIFT/VK_CONTROL/VK_MENU/VK_PAUSE/VK_ESCAPE
/VK_SPACE/VK_LEFT/VK_RIGHT/VK_UP/VK_DOWN
F1--F12：$70(112)--$7B(123)
A-Z：$41(65)--$5A(90)
0-9：$30(48)--$39(57)
◇[DELPHI]初步判断程序母语
DELPHI软件的DOS提示：This Program Must Be Run Under Win32.
VC++软件的DOS提示：This Program Cannot Be Run In DOS Mode.

◇[DELPHI]操作Cookie
response.cookies("name").domain:='http://www.086net.com';
with response.cookies.add do
begin
name:='username';
value:='username';
end

◇[DELPHI]增加到文档菜单连接
uses shellapi,shlOBJ;
shAddToRecentDocs(shArd_path,pchar(filepath));//增加连接
shAddToRecentDocs(shArd_path,nil);//清空

◇[杂类]备份智能ABC输入法词库
windows/system/user.rem
windows/system/tmmr.rem

◇[DELPHI]判断鼠标按键
if GetAsyncKeyState(VK_LButton)<>0 then ... //左键
if GetAsyncKeyState(VK_MButton)<>0 then ... //中键
if GetAsyncKeyState(VK_RButton)<>0 then ... //右键

◇[DELPHI]设置窗体的最大显示
onformCreate事件
self.width:=screen.width;
self.height:=screen.height;

◇[DELPHI]按键接受消息
OnCreate事件中处理：Application.OnMessage:=MyOnMessage;
procedure Tform1.MyOnMessage(var MSG:TMSG;var Handle:Boolean);
begin
if msg.message=256 then ... //ANY键
if msg.message=112 then ... //F1
if msg.message=113 then ... //F2
end;

◇[杂类]隐藏共享文件夹
共享效果：可访问，但不可见（在资源管理、网络邻居中）
取共享名为：direction$
访问：//computer/dirction/

◇[Java Script]Java Script网页常用效果
网页60秒定时关闭

关闭窗口
关闭
定时转URL

设为首页
设为首页
收藏本站
收藏本站
加入频道
加入频道

◇[DELPHI]随机产生文本色
randomize;//随机种子
memo1.font.color:=rgb(random(255),random(255),random(255));

◇[DELPHI]DELPHI5 UPDATE升级补丁序列号
1000003185
90X25fx0

◇[DELPHI]文件名的非法字符过滤
for i:=1 to length(s) do
if s[i] in ['/','/',':','*','?','<','>','|'] then

◇[DELPHI]转换函数的定义及说明
datetimetofiledate (datetime:Tdatetime):longint; 将Tdatetime格式的日期时间值转换成DOS格式的日期时间值
datetimetostr (datetime:Tdatetime):string; 将Tdatatime格式变量转换成字符串，如果datetime参数不包含日期值，返回字符串日期显示成为00/00/00，如果datetime参数中没有时间值，返回字符串中的时间部分显示成为00：00：00 AM
datetimetostring (var result string;
const format:string;
datetime:Tdatetime); 根据给定的格式字符串转换时间和日期值，result为结果字符串，format为转换格式字符串，datetime为日期时间值
datetostr (date:Tdatetime) 使用shortdateformat全局变量定义的格式字符串将date参数转换成对应的字符串
floattodecimal (var result:Tfloatrec;value:
extended;precision,decimals:
integer); 将浮点数转换成十进制表示
floattostr (value:extended):string 将浮点数value转换成字符串格式，该转换使用普通数字格式，转换的有效位数为15位。
floattotext (buffer:pchar;value:extended;
format:Tfloatformat;precision,
digits:integer):integer; 用给定的格式、精度和小数将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数，buffer是非0结果的字符串缓冲区。
floattotextfmt (buffer:pchar;value:extended;
format:pchar):integer 用给定的格式将浮点值value转换成十进制表示形式，转换结果存放于buffer参数中，函数返回值为存储到buffer中的字符位数。
inttohex (value:longint;digits:integer):
string; 将给定的数值value转换成十六进制的字符串。参数digits给出转换结果字符串包含的数字位数。
inttostr (value:longint):string 将整数转换成十进制形式字符串
strtodate (const S:string):Tdatetime 将字符串转换成日期值，S必须包含一个合法的格式日期的字符串。
strtodatetime (const S:string):Tdatetime 将字符串S转换成日期时间格式，S必须具有MM/DD/YY HH：MM：SS[AM|PM]格式，其中日期和时间分隔符与系统时期时间常量设置相关。如果没有指定AM或PM信息，表示使用24小时制。
strtofloat (const S:string):extended; 将给定的字符串转换成浮点数，字符串具有如下格式：
[+|-]nnn…[.]nnn…[<+|-><+|->nnnn]
strtoint (const S:string):longint 将数字字符串转换成整数，字符串可以是十进制或十六进制格式，如果字符串不是一个合法的数字字符串，系统发生ECONVERTERROR异常
strtointdef (const S:string;default:
longint):longint; 将字符串S转换成数字，如果不能将S转换成数字，strtointdef函数返回参数default的值。
strtotime (const S:string):Tdatetime 将字符串S转换成TDATETIME值，S具有HH：MM：SS[AM|PM]格式，实际的格式与系统的时间相关的全局变量有关。
timetostr (time:Tdatetime):string; 将参数TIME转换成字符串。转换结果字符串的格式与系统的时间相关常量的设置有关。

◇[DELPHI]程序不出现在ALT+CTRL+DEL
在implementation后添加声明:
function RegisterServiceProcess(dwProcessID, dwType: Integer): Integer; stdcall; external 'KERNEL32.DLL';
RegisterServiceProcess(GetCurrentProcessID, 1);//隐藏
RegisterServiceProcess(GetCurrentProcessID, 0);//显示
用ALT+DEL+CTRL看不见

◇[DELPHI]程序不出现在任务栏
uses windows
var
Extendedstyle : Integer;
begin
Application.Initialize;
//==============================================================
Extendedstyle := GetWindowLong (Application.Handle, GWL_EXstyle);
SetWindowLong(Application.Handle, GWL_EXstyle, Extendedstyle OR WS_EX_TOOLWINDOW
AND NOT WS_EX_APPWINDOW);
//===============================================================
Application.Createform(Tform1, form1);
Application.Run;
end.

◇[DELPHI]如何判断拨号网络是开还是关
if GetSystemMetrics(SM_NETWORK) AND $01 = $01 then
showmessage('在线!')
else showmessage('不在线!');

◇[DELPHI]实现IP到域名的转换
function GetDomainName(Ip:string):string;
var
pH:PHostent;
data:twsadata;
ii:dword;
begin
WSAStartup($101, Data);
ii:=inet_addr(pchar(ip));
pH:=gethostbyaddr(@ii,sizeof(ii),PF_INET);
if (ph<>nil) then
result:=pH.h_name
else
result:='';
WSACleanup;
end;

◇[DELPHI]处理“右键菜单”方法
var
reg: TRegistry;
begin
reg := TRegistry.Create;
reg.RootKey:=HKEY_CLASSES_ROOT;
reg.OpenKey('*/shell/check/command', true);
reg.WriteString('', '"' + application.ExeName + '" "%1"');
reg.CloseKey;
reg.OpenKey('*/shell/diary', false);
reg.WriteString('', '操作(&C)');
reg.CloseKey;
reg.Free;
showmessage('DONE!');
end;

◇[DELPHI]发送虚拟键值ctrl V
procedure sendpaste;
begin
keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), 0, 0);
keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), 0, 0);
keybd_event(ord('V'), MapVirtualKey(ord('V'), 0), KEYEVENTF_KEYUP, 0);
keybd_event(VK_Control, MapVirtualKey(VK_Control, 0), KEYEVENTF_KEYUP, 0);
end;

◇[DELPHI]当前的光驱的盘符
procedure getcdrom(var cd:char);
var
str:string;
drivers:integer;
driver:char;
i,temp:integer;
begin
drivers:=getlogicaldrives;
temp:=(1 and drivers);
for i:=0 to 26 do
begin
if temp=1 then
begin
driver:=char(i+integer('a'));
str:=driver+':';
if getdrivetype(pchar(str))=drive_cdrom then
begin
cd:=driver;
exit;
end;
end;
drivers:=(drivers shr 1);
temp:=(1 and drivers);
end;
end;

◇[DELPHI]字符的加密与解密
function cryptstr(const s:string; stype: dword):string;
var
i: integer;
fkey: integer;
begin
result:='';
case stype of
0: setpass;
begin
randomize;
fkey := random($ff);
for i:=1 to length(s) do
result := result+chr( ord(s[i]) xor i xor fkey);
result := result + char(fkey);
end;
1: getpass
begin
fkey := ord(s[length(s)]);
for i:=1 to length(s) - 1 do
result := result+chr( ord(s[i]) xor i xor fkey);
end;
end;

□◇[DELPHI]向其他应用程序发送模拟键
var
h: THandle;
begin
h := FindWindow(nil, '应用程序标题');
PostMessage(h, WM_KEYDOWN, VK_F9, 0);//发送F9键
end;

□◇[DELPHI]DELPHI 支持的DAO数据格式
td.Fields.Append(td.CreateField ('dbBoolean',dbBoolean,0));
td.Fields.Append(td.CreateField ('dbByte',dbByte,0));
td.Fields.Append(td.CreateField ('dbInteger',dbInteger,0));
td.Fields.Append(td.CreateField ('dbLong',dbLong,0));
td.Fields.Append(td.CreateField ('dbCurrency',dbCurrency,0));
td.Fields.Append(td.CreateField ('dbSingle',dbSingle,0));
td.Fields.Append(td.CreateField ('dbDouble',dbDouble,0));
td.Fields.Append(td.CreateField ('dbDate',dbDate,0));
td.Fields.Append(td.CreateField ('dbBinary',dbBinary,0));
td.Fields.Append(td.CreateField ('dbText',dbText,0));
td.Fields.Append(td.CreateField ('dbLongBinary',dbLongBinary,0));
td.Fields.Append(td.CreateField ('dbMemo',dbMemo,0));
td.Fields['ID'].Set_Attributes(dbAutoIncrField);//自增字段

□◇[DELPHI]DELPHI配置MS SQL 7和BDE步骤
第一步，配置ODBC：
先在ODBC 中设数据源，安装过SQL Server7.0 后,ODBC中有一项"系统DSN"应该有两项
数据源，一个是MQIS，一个是LocalSever，任选一个选后点击配置按钮，不知你的SQL7.0
是不是安装在本地机器上，如果是的话直接进行下一步，如果不是，在服务器一栏中填上
Server,然后进行下一步，填写登录ID 和密码（登录ID，和密码是在SQL7.0中的用户选项
中设的）。
第二步，配置BDE:
打开Delphi的BDE，然后点击MQIS 或 LocalServer，就会提示用户名和密码，这和
ODBC的用户名和密码是一样的，填上就行了。
第三步，配置程序：
如果用的是TTable，就在TTable的DatabaseName中选择MQIS 或LocalServer,然后在
TableName中选择Sale就行了，然后将Active改为True,Delphi弹出提示对话，填入用户
名和密码。
如果用的是TQuery,在TQuery上点击右键，再击"SQL Builder"，这是以界面方式配置
SQL语句，或者在TQuery的SQL中填入SQL语句。最后，别忘了将Active改为True。
在运行也可能配置TQuery,具体见Delphi帮助。

□◇[DELPHI]得到图像上某一点的RGB值
procedure Tform1.Image1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
red,green,blue:byte ;
i:integer;
begin
i:= image1.Canvas.Pixels[x,y];
Blue:= GetBvalue(i);
Green:= GetGvalue(i):
Red:= GetRvalue(i);
Label1.Caption:=inttostr(Red);
Label2.Caption:=inttostr(Green);
Label3.Caption:=inttostr(Blue);
end;

□◇[DELPHI]关于日期格式分解转换
var year,month,day:word;now2:Tdatatime;
now2:=date();
decodedate(now2,year,month,day);
lable1.Text :=inttostr(year)+'年'+inttostr(month)+'月'+inttostr(day)+'日';

◇[DELPHI]如何判断当前网络连接方式
判断结果是MODEM、局域网或是代理服务器方式。
uses wininet;
Function ConnectionKind :boolean;
var flags: dword;
begin
Result := InternetGetConnectedState(@flags, 0);
if Result then
begin
if (flags and INTERNET_CONNECTION_MODEM) = INTERNET_CONNECTION_MODEM then
begin
showmessage('Modem');
end;
if (flags and INTERNET_CONNECTION_LAN) = INTERNET_CONNECTION_LAN then
begin
showmessage('LAN');
end;
if (flags and INTERNET_CONNECTION_PROXY) = INTERNET_CONNECTION_PROXY then
begin
showmessage('Proxy');
end;
if (flags and INTERNET_CONNECTION_MODEM_BUSY)=INTERNET_CONNECTION_MODEM_BUSY then
begin
showmessage('Modem Busy');
end;
end;
end;

◇[DELPHI]如何判断字符串是否是有效EMAIL地址
function IsEMail(EMail: String): Boolean;
var s: String;ETpos: Integer;
begin
ETpos:= pos('@', EMail);
if ETpos > 1 then
begin
s:= copy(EMail,ETpos+1,Length(EMail));
if (pos('.', s) > 1) and (pos('.', s) < length(s)) then
Result:= true else Result:= false;
end
else
Result:= false;
end;

◇[DELPHI]判断系统是否连接INTERNET
需要引入URL.DLL中的InetIsOffline函数。
函数申明为：
function InetIsOffline(Flag: Integer): Boolean; stdcall; external 'URL.DLL';
然后就可以调用函数判断系统是否连接到INTERNET
if InetIsOffline(0) then ShowMessage('not connected!')
else ShowMessage('connected!');
该函数返回TRUE如果本地系统没有连接到INTERNET。
附：
大多数装有IE或OFFICE97的系统都有此DLL可供调用。
InetIsOffline
BOOL InetIsOffline(
DWORD dwFlags,
);

◇[DELPHI]简单地播放和暂停WAV文件
uses mmsystem;

function PlayWav(const FileName: string): Boolean;
begin
Result := PlaySound(PChar(FileName), 0, SND_ASYNC);
end;

procedure StopWav;
var
buffer: array[0..2] of char;
begin
buffer[0] := #0;
PlaySound(Buffer, 0, SND_PURGE);
end;

◇[DELPHI]取机器BIOS信息
with Memo1.Lines do
begin
Add('MainBoardBiosName:'+^I+string(Pchar(Ptr($FE061))));
Add('MainBoardBiosCopyRight:'+^I+string(Pchar(Ptr($FE091))));
Add('MainBoardBiosDate:'+^I+string(Pchar(Ptr($FFFF5))));
Add('MainBoardBiosSerialNo:'+^I+string(Pchar(Ptr($FEC71))));
end;

◇[DELPHI]网络下载文件
uses UrlMon;

function DownloadFile(Source, Dest: string): Boolean;
begin
try
Result := UrlDownloadToFile(nil, PChar(source), PChar(Dest), 0, nil) = 0;
except
Result := False;
end;
end;

if DownloadFile('http://www.borland.com/delphi6.zip, 'c:/kylix.zip') then
ShowMessage('Download succesful')
else ShowMessage('Download unsuccesful')

◇[DELPHI]解析服务器IP地址
uses winsock

function IPAddrToName(IPAddr : String): String;
var
SockAddrIn: TSockAddrIn;
HostEnt: PHostEnt;
WSAData: TWSAData;
begin
WSAStartup($101, WSAData);
SockAddrIn.sin_addr.s_addr:= inet_addr(PChar(IPAddr));
HostEnt:= gethostbyaddr(@SockAddrIn.sin_addr.S_addr, 4, AF_INET);
if HostEnt<>nil then result:=StrPas(Hostent^.h_name) else result:='';
end;

◇[DELPHI]取得快捷方式中的连接
function ExeFromLink(const linkname: string): string;
var
FDir,
FName,
ExeName: PChar;
z: integer;
begin
ExeName:= StrAlloc(MAX_PATH);
FName:= StrAlloc(MAX_PATH);
FDir:= StrAlloc(MAX_PATH);
StrPCopy(FName, ExtractFileName(linkname));
StrPCopy(FDir, ExtractFilePath(linkname));
z:= FindExecutable(FName, FDir, ExeName);
if z > 32 then
Result:= StrPas(ExeName)
else
Result:= '';
StrDispose(FDir);
StrDispose(FName);
StrDispose(ExeName);
end;

◇[DELPHI]控制TCombobox的自动完成
{'Sorted' property of the TCombobox to true }
var lastKey: Word; //全局变量
//TCombobox的OnChange事件
procedure Tform1.AutoCompleteChange(Sender: TObject);
var
SearchStr: string;
retVal: integer;
begin
SearchStr := (Sender as TCombobox).Text;
if lastKey <> VK_BACK then // backspace: VK_BACK or $08
begin
retVal := (Sender as TCombobox).Perform(CB_FINDSTRING, -1, LongInt(PChar(SearchStr)));
if retVal > CB_Err then
begin
(Sender as TCombobox).ItemIndex := retVal;
(Sender as TCombobox).SelStart := Length(SearchStr);
(Sender as TCombobox).SelLength :=
(Length((Sender as TCombobox).Text) - Length(SearchStr));
end; // retVal > CB_Err
end; // lastKey <> VK_BACK
lastKey := 0; // reset lastKey
end;
//TCombobox的onKeyDown事件
procedure Tform1.AutoCompleteKeyDown(Sender: TObject; var Key: Word;
Shift: TShiftState);
begin
lastKey := Key;
end;

◇[DELPHI]如何清空一个目录
function EmptyDirectory(TheDirectory :String ; Recursive : Boolean) :
Boolean;
var
SearchRec : TSearchRec;
Res : Integer;
begin
Result := False;
TheDirectory := NormalDir(TheDirectory);
Res := FindFirst(TheDirectory + '*.*', faAnyFile, SearchRec);
try
while Res = 0 do
begin
if (SearchRec.Name <> '.') and (SearchRec.Name <> '..') then
begin
if ((SearchRec.Attr and faDirectory) > 0) and Recursive
then begin
EmptyDirectory(TheDirectory + SearchRec.Name, True);
RemoveDirectory(PChar(TheDirectory + SearchRec.Name));
end
else begin
DeleteFile(PChar(TheDirectory + SearchRec.Name))
end;
end;
Res := FindNext(SearchRec);
end;
Result := True;
finally
FindClose(SearchRec.FindHandle);
end;
end;

◇[DELPHI]安装程序如何添加到Uninstall列表
操作注册表，如下：
1.在HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall键下建立一个主键，名称任意。
例HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/MyUninstall
2.在HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/MyUnistall下键两个串值，
这两个串值的名称是特定的：DisplayName和UninstallString。
3.给串DisplayName赋值为显示在“删除应用程序列表”中的名称，如'Aiming Uninstall one';
给串UninstallString赋值为执行的删除命令，如 C:/WIN97/uninst.exe -f"C:/TestPro/aimTest.isu"

◇[DELPHI]截获WM_QUERYENDSESSION关机消息
type
Tform1 = class(Tform)
procedure WMQueryEndSession(var Message: TWMQueryEndSession); message WM_QUERYENDSESSION;
procedure CMEraseBkgnd(var Message:TWMEraseBkgnd);Message WM_ERASEBKGND;
private
{ Private declarations }
public
{ Public declarations }
end;

procedure Tform1.WMQueryEndSession(var Message: TWMQueryEndSession);
begin
Showmessage('computer is about to shut down');
end;

◇[DELPHI]获取网上邻居
procedure getnethood();//NT做服务器，WIN98上调试通过。
var
a,i:integer;
errcode:integer;
netres:array[0..1023] of netresource;
enumhandle:thandle;
enumentries:dword;
buffersize:dword;
s:string;
mylistitems:tlistitems;
mylistitem:tlistitem;
alldomain:tstrings;
begin //listcomputer is a listview to list all computers;controlcenter is a form.
alldomain:=tstringlist.Create ;
with netres[0] do begin
dwscope :=RESOURCE_GLOBALNET;
dwtype :=RESOURCETYPE_ANY;
dwdisplaytype :=RESOURCEDISPLAYTYPE_DOMAIN;
dwusage :=RESOURCEUSAGE_CONTAINER;
lplocalname :=nil;
lpremotename :=nil;
lpcomment :=nil;
lpprovider :=nil;
end; // 获取所有的域
errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle);
if errcode=NO_ERROR then begin
enumentries:=1024;
buffersize:=sizeof(netres);
errcode:=wnetenumresource(enumhandle,enumentries,@netres[0],buffersize);
end;
a:=0;
mylistitems :=controlcenter.lstcomputer.Items ;
mylistitems.Clear ;
while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do
begin
alldomain.Add (netres[a].lpremotename);
a:=a+1;
end;
wnetcloseenum(enumhandle);
// 获取所有的计算机
mylistitems :=controlcenter.lstcomputer.Items ;
mylistitems.Clear ;
for i:=0 to alldomain.Count-1 do
begin
with netres[0] do begin
dwscope :=RESOURCE_GLOBALNET;
dwtype :=RESOURCETYPE_ANY;
dwdisplaytype :=RESOURCEDISPLAYTYPE_SERVER;
dwusage :=RESOURCEUSAGE_CONTAINER;
lplocalname :=nil;
lpremotename :=pchar(alldomain[i]);
lpcomment :=nil;
lpprovider :=nil;
end;
ErrCode:=WNetOpenEnum(RESOURCE_GLOBALNET,RESOURCETYPE_ANY,RESOURCEUSAGE_CONTAINER,@netres[0],EnumHandle);
if errcode=NO_ERROR then
begin
EnumEntries:=1024;
BufferSize:=SizeOf(NetRes);
ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize);
end;
a:=0;
while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do
begin
mylistitem :=mylistitems.Add ;
mylistitem.ImageIndex :=0;
mylistitem.Caption :=uppercase(stringreplace(string(NetRes[a].lpremotename),'//','',[rfReplaceAll]));
a:=a+1;
end;
wnetcloseenum(enumhandle);
end;
end;

◇[DELPHI]获取某一计算机上的共享目录
procedure getsharefolder(const computername:string);
var
errcode,a:integer;
netres:array[0..1023] of netresource;
enumhandle:thandle;
enumentries,buffersize:dword;
s:string;
mylistitems:tlistitems;
mylistitem:tlistitem;
mystrings:tstringlist;
begin
with netres[0] do begin
dwscope :=RESOURCE_GLOBALNET;
dwtype :=RESOURCETYPE_DISK;
dwdisplaytype :=RESOURCEDISPLAYTYPE_SHARE;
dwusage :=RESOURCEUSAGE_CONTAINER;
lplocalname :=nil;
lpremotename :=pchar(computername);
lpcomment :=nil;
lpprovider :=nil;
end; // 获取根结点
errcode:=wnetopenenum(RESOURCE_GLOBALNET,RESOURCETYPE_DISK,RESOURCEUSAGE_CONTAINER,@netres[0],enumhandle);
if errcode=NO_ERROR then
begin
EnumEntries:=1024;
BufferSize:=SizeOf(NetRes);
ErrCode:=WNetEnumResource(EnumHandle,EnumEntries,@NetRes[0],BufferSize);
end;
wnetcloseenum(enumhandle);
a:=0;
mylistitems:=controlcenter.lstfile.Items ;
mylistitems.Clear ;
while (string(netres[a].lpprovider)<>'') and (errcode=NO_ERROR) do
begin
with mylistitems do
begin
mylistitem:=add;
mylistitem.ImageIndex :=4;
mylistitem.Caption :=extractfilename(netres[a].lpremotename);
end;
a:=a+1;
end;
end;

◇[DELPHI]得到硬盘序列号
var SerialNum : pdword; a, b : dword; Buffer : array [0..255] of char;
begin
if GetVolumeInformation('c:/', Buffer, SizeOf(Buffer), SerialNum, a, b, nil, 0) then Label1.Caption := IntToStr(SerialNum^);
end;

1.关于MDI主窗体背景新解
? 在Form中添加Image控件
?? 设BMP图象
?? name为 IMG_BK
?? 在Foem的Create事件中写入
?? Self.brush.bitmap:=img_bk.picture.bitmap;

2.在标题栏处画VCL控件(一行解决问题!!!)
?? 在 form 的onpaint 事件中
?? 控件.pointto(getdc(0),left,top);

3 Edit 中只输入数字
??? SetWindowLong(Edit1.Handle, GWL_STYLE,
????????????????? GetWindowLong(Edit1.Handle, GWL_STYLE) or
????????????????? ES_NUMBER);
4.类似MDI方式新解
在要设置child的oncreate方式下写入:
?????????? self.parent:='要设置为mainform的Form';

5. 屏幕的Refresh(只需一行!)
RedrawWindow(0,nil,0,RDW_ERASE or RDW_INVALIDATE or RDW_ALLCHILDREN);
??????????????? |???? |
?????????????? ---?? ----
???????????? handle? RGN(可刷新局部屏幕)
6.类似DOS下的CLS指令的WINDOWS指令!
? paintdesktop(getdc(0));

7.扩展控件新功能
?? 在编程中 ,我们经常要控制控件的动作,但该控件又没有提供该方法

?? 这时 ,可通过发消息给该控件 ,以达到我们的目的!

?? 如:
????? button1.perform(wm_keydown,13,0);

????? listbox1.perform(wm_vscroll,sb_linedown,0);

?? 等等?? 可少去 重载之苦!!!!!

8.闪烁标题如打印机超时(一行)
form 放一timer 控件

??????? time 事件? 中 写入 ;

???????????? flashwindow(application.handle,true);

9.在桌面上加个VCL控件!(不是画的,不可refresh)
? windows.setparent(控件.handle,0);

注: 想放哪都行? (如'开始处状态栏')

10.关于? '类似MDI方式新解(一行就行!!!!)'的修正
? windows.setparent(self.handle,'要设置为mainform的Form');

11 普通Form象MDI中mainform始终在最底层
??????? SetActiveWindow(0);
?? 或? SetwindowPos(...);
12 执行下列语句开始Windows屏幕保护程序
?? SendMessage(HWND_BROADCAST,WM_SYSCOMMAND,SC_SCREENSAVE,0);
13 button 的 caption 多行显示：
?? SetWindowLong(Button1.handle, GWL_STYLE,
???????????????? GetWindowlong(Button1.Handle, GWL_STYLE) or
???????????????? BS_MULTILINE);
?? 必要时加上 Button1.Invalidate;

14.整死windows98 :)
?? asm int $19 end

?

Q: 怎么来改变ListBox的字体呢？就修改其中的一行。

A: 先把ListBox1.Style 设成lbOwnerDrawFixed
然后在 OnDrawItem 事件下写下如下代码

procedure TForm1.ListBox1DrawItem(Control: TWinControl; Index: Integer;
?Rect: TRect; State: TOwnerDrawState);
var
?Offset: Integer;
begin
?Offset := 2;
?with (Control as TListBox).Canvas do begin
?? FillRect(Rect);
?? if Index = 2 then begin
???? Font.Name := 'Fixedsys';
???? Font.Color := clRed;
???? Font.Size := 12;
?? end else begin
???? Font.Name := 'Arial';
???? Font.Color := clBlack;
???? Font.Size := 8;
?? end;
?? if odSelected in State then begin
???? Font.Color := clWhite;
?? end;
?? TextOut(Rect.Left + Offset, Rect.Top, (Control as TListBox).Items[Index]);
?end;
end;

Q：怎么在RichEdit里面插入图片？

A: 请到这里来看看会找到答案

http://www.undu.com/Articles/991107c.html

Q：怎么才能目录呢？

A：我来。

uses ShellAPI;

procedure DeleteFiles(Source: string);
var
? FO: TShFileOpStruct;
begin
? FillChar(FO,SizeOf(FO),#0);
? FO.Wnd := Form1.Handle;
? FO.wFunc := FO_DELETE;
? FO.pFrom := PChar(Source);
? ShFileOperation(FO);
end;

procedure EmptyDirectory(Path: String);
begin
??? if DirectoryExists(Path) then
??? begin
???????? DeleteFiles(Path+'/*');
??? end
??? else
??????? ForceDirectories(Path);
end;

Q:如何映射网络驱动器？

比如我要把file://Server/sys映射为F盘。我需要一个函数比如

给出输入参数为file://server/sys/home/bruno给我的返回值是F:/home/bruno

A：

Function UNCToDrive(UNCPath: STring): STring;
var
? DriveNum: Integer;
? DriveChar: Char;
? DriveBits: set of 0..25;
? StartSTr,TestStr: STring;
begin
? result := UNCPath;
? StartSTr := UNCPath;
? Integer(DriveBits) := GetLogicalDrives;
? for DriveNum := 0 to 25 do
? begin
??? if (DriveNum in DriveBits) then begin
????? DriveChar := Char(DriveNum + Ord('A'));
????? TestSTr := ExpandUNCFileName(DriveChar+':/');
????? If TEstStr <> '' then
??????? If Pos(Uppercase(TestSTr),Uppercase(STartSTr)) > 0 then
?????????? begin
????????????? Delete(StartSTr,1,Length(TestSTr));
????????????? result := DriveChar+':/'+StartSTr;
????????????? break;
?????????? end;
??????? end;
? end;
end;

Q：我有一些特殊语言的字体来用，它们存储在我的EXE文件里，但是两点。

?? * 我不想放到font文件夹里
?? * 我不想从EXE文件里面提取出来

如果可能，请告诉我。

因为，我的字体是自己做的不是windows自带的，我想保护自己的东西。

A:不太可能，必须提取出来。你可以使用这个保护过程来保护你的文件不被修改和删除。

在EXE执行的时候把字体放到临时文件夹里，结束的时候删除它。

function ProtectFile(sFilename : string) : hFile;
var
?????? hf: hFile;
?????? lwHFileSize, lwFilesize: longword;
?????? ofs : TOFStruct;
begin
?????? if FileExists(sFilename) then
?????? begin
?????????????? hf := OpenFile(pchar(sFilename), ofs, OF_READ or OF_WRITE or OF_SHARE_EXCLUSIVE);
?????????????? if hf <> 0 then
?????????????? begin
?????????????????????? lwFilesize := GetFileSize(hf, @lwHFileSize);
?????????????????????? if LockFile(hf, 0, 0, lwFilesize, lwHFilesize) then
?????????????????????? Result := hf else Result := 0;
?????????????? end
?????????????? else Result := 0;
?????? end
?????? else Result := 0;
end;

//..
var
?ResS: TResourceStream;
?TempPath: array [0..MAX_PATH] of Char;
?TempDir: string;
begin
?GetTempPath(Sizeof(TempPath), TempPath);
?TempDir := StrPas(Path);
?ResS := TResourceStream.Create(hInstance, 'SOME_FONT', 'RT_FONT');
?ResS.SavetoFile(TempDir+'some_font.ttf');
?ResS.Free;
?AddFontResource(TempDir+'some_font.ttf');
?SendMessage(HWND_BROADCAST, WM_FONTCHANGE, 0, 0);
?ProtectFile(TempDir+'some_font.ttf');
end;

Q：如何得到当前的ProgramFiles得路径？

A：用读写注册表的方法就可以做到。

代码如下：

uses registry;

procedure TForm1.Button1Click(Sender: TObject);
var
?reg:TRegistry;
begin
?reg:=TRegistry.Create;
?reg.RootKey:=HKEY_LOCAL_MACHINE;
?if reg.OpenKey('SOFTWARE/Microsoft/Windows/CurrentVersion',false) then
?begin
?? edit1.Text:=reg.ReadString('ProgramFilesDir');
?? reg.CloseKey;
?? reg.Free;
?end;
end;

Q:如何在Jpg图像上写上字？

A：这里有个代码。

hmm, here's a sample with help of Bitmap, you can chance the brush style of canvas to bsClear to make the text transparent

uses
?Jpeg;

procedure TForm1.Button1Click(Sender: TObject);
var
?Bmp : TBitmap;
?Jpg : TJpegImage;
begin
?try
?? Bmp := TBitmap.Create;
?? Jpg := TjpegImage.Create;
?? Jpg.LoadFromFile('c:/img.jpg');
?? Bmp.Assign(Jpg);
?? Bmp.Canvas.Brush.Style := bsClear;
?? Bmp.Canvas.Font.Color := clYellow;
?? Bmp.Canvas.TextOut(10,10,'Hello World');
?? Jpg.Assign(Bmp);
?? Jpg.SaveToFile('c:/img2.jpg');
?finally
?? bmp.Free;
?? jpg.Free;
?end;
end;

Q：怎么用delphi修改文件的时间呢？

在windows下，属性里面有三个日起，创建，修改，存储。我怎么来修改啊？

A：Here is the excerpt from the Jedi Code Library. If it is not complete then get the JCL.

type
?// indicates the file time to set, used by SetFileTimesHelper and SetDirTimesHelper
?TFileTimes = (ftLastAccess, ftLastWrite, ftCreation);

function SetFileTimesHelper(const FileName: string; const DateTime: TDateTime; Times: TFileTimes): Boolean;
var
?Handle: THandle;
?FileTime: TFileTime;
?SystemTime: TSystemTime;
begin
?Result := False;
?Handle := CreateFile(PChar(FileName), GENERIC_WRITE, FILE_SHARE_READ, nil,
?? OPEN_EXISTING, 0, 0);
?if Handle <> INVALID_HANDLE_VALUE then
?try
?? //SysUtils.DateTimeToSystemTime(DateTimeToLocalDateTime(DateTime), SystemTime);
?? SysUtils.DateTimeToSystemTime(DateTime, SystemTime);
?? if Windows.SystemTimeToFileTime(SystemTime, FileTime) then
?? begin
???? case Times of
?????? ftLastAccess:
???????? Result := SetFileTime(Handle, nil, @FileTime, nil);
?????? ftLastWrite:
???????? Result := SetFileTime(Handle, nil, nil, @FileTime);
?????? ftCreation:
???????? Result := SetFileTime(Handle, @FileTime, nil, nil);
???? end;
?? end;
?finally
?? CloseHandle(Handle);
?end;
end;

//--------------------------------------------------------------------------------------------------

function SetFileLastAccess(const FileName: string; const DateTime: TDateTime): Boolean;
begin
?Result := SetFileTimesHelper(FileName, DateTime, ftLastAccess);
end;

//--------------------------------------------------------------------------------------------------

function SetFileLastWrite(const FileName: string; const DateTime: TDateTime): Boolean;
begin
?Result := SetFileTimesHelper(FileName, DateTime, ftLastWrite);
end;

//--------------------------------------------------------------------------------------------------

function SetFileCreation(const FileName: string; const DateTime: TDateTime): Boolean;
begin
?Result := SetFileTimesHelper(FileName, DateTime, ftCreation);
end;

google上的有关delphi得网址：

http://directory.google.com/Top/Computers/Programming/Languages/Delphi/?tc=1

yahoo上有关delphi得网址

http://dir.yahoo.com/Computers_and_Internet/Programming_and_Development/Languages/Delphi/

删掉程序自己的exe文件
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
var
? F:TextFile;
begin
? AssignFile(F,'delself.bat');
? Rewrite(F);{F为TextFile类型}
? WriteLn(F,'del '+ExtractFileName(Application.ExeName));
? WriteLn(F,'del %0');?? //删除自己delself.bat
? CloseFile(F);
? WinExec('delself.bat',SW_HIDE);
end;

if ord(s[9])>128 then
? ShowMessage('该位置字符是汉字');
汉字是双字节的
更改系统时间格式：

var
? str: string;
begin
? str := 'yyyy-mm-dd';
? if SetLocaleInfoa(LOCALE_SYSTEM_DEFAULT, LOCALE_SLONGDATE, PChar(str)) then
? begin
??? showmessage('更改日期格式成功');
? end;
end;

休息一分钟：
var
I:integer;
begin
? i:=gettickcount;
? while (Gettickcount-i)<=10000 do
??? application.ProcessMessages;//保证消息循环
end;

?

取主文件名:
function retuFileName(const FileName: string): string;
var
? I: Integer;
begin
? I := LastDelimiter('.', FileName);
? Result := Copy(FileName, 1, i-1);

end;

?

?

(1).按下ctrl和其它键之后发生一事件。
??? procedure TForm1.FormKeyDown(Sender: TObject; var Key: Word;
????? Shift: TShiftState);
??? begin
????? if (ssCtrl in Shift) and (key =67) then
???????? showmessage('keydown Ctrl+C');
??? end;
(2).Dbgrid中用Enter键代替Tab键.
?? procedure TForm1.DBGrid1KeyPress(Sender: TObject; var Key: Char);
?? begin
???? if Key = #13 then
???? if ActiveControl = DBGrid1 then
???? begin
??????? TDBGrid(ActiveControl).SelectedIndex := TDBGrid(ActiveControl).SelectedIndex + 1;
??????? Key := #0;
???? end;
?? end;
(3).Dbgrid中选择多行发生一事件。
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
??? i:integer;
??? bookmarklist:Tbookmarklist;
??? bookmark:tbookmarkstr;
??? begin
????? bookmark:=adoquery1.Bookmark;
????? bookmarklist:=dbgrid1.SelectedRows;
????? try
????? begin
??????? for i:=0 to bookmarklist.Count-1 do
??????? begin
????????? adoquery1.Bookmark:=bookmarklist[i];
????????? with adoquery1 do
????????? begin
??????????? edit;
??????????? fieldbyname('mdg').AsString:=edit2.Text;
??????????? post;
????????? end;
??????? end;
????? end;
????? finally
????? adoquery1.Bookmark:=bookmark;
????? end;
??? end;
(4).Form的一个出现效果。
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
??? r:thandle;
??? i:integer;
??? begin
????? for i:=1 to trunc(width/1.414) do
????? begin
??????? r:=CreateEllipticRgn(trunc(width/2)-i,trunc(height/2)-i,trunc(width/2)+i,trunc(height/2)+i);
??????? SetWindowRgn(handle,r,true);
??????? Application.ProcessMessages;
??????? sleep(1);
????? end;
??? end;
(5).用Enter代替Tab在编辑框中移动隹点。
??? procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);
??? begin
????? if key=#13 then
??????? begin
????????? if not (Activecontrol is Tmemo) then
????????? begin
??????????? key:=#0;
??????????? keybd_event(vk_tab,mapvirtualkey(vk_tab,0),0,0);
????????? end;
??????? end;
??? end;
(6).Progressbar加上色彩。
??? const
??? {$EXTERNALSYM PBS_MARQUEE}
??? PBS_MARQUEE = 08;
??? var
????? Form1: TForm1;
??? implementation
??? {$R *.dfm}
??? uses
??? CommCtrl;
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? // Set the Background color to teal
????? Progressbar1.Brush.Color := clTeal;
????? // Set bar color to yellow
????? SendMessage(ProgressBar1.Handle, PBM_SETBARCOLOR, 0, clYellow);
??? end;
(7).住点移动时编辑框色彩不同。
??? procedure TForm1.Edit1Enter(Sender: TObject);
??? begin
????? (sender as tedit).Color:=clred;
??? end;
??? procedure TForm1.Edit1Exit(Sender: TObject);
??? begin
????? (sender as tedit).Color:=clwhite;
??? end;
(8).备份和恢复
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? if OpenDialog1.Execute then
????? begin
??????? try
????????? adoconnection1.Connected:=False;
????????? adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+
????????? 'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False';
????????? adoconnection1.Connected:=True;
????????? with adoQuery1 do
????????? begin
??????????? Close;
??????????? SQL.Clear;
??????????? SQL.Add('Backup DataBase sfa to disk ='''+opendialog1.FileName+'''');
??????????? ExecSQL;
????????? end;
??????? except
????????? ShowMessage('±?·Y꧰ü');
??????? Exit;
??????? end;
????? end;
????? Application.MessageBox('1§?2?ú￡?êy?Y±?·Y3é1|','ìáê?',MB_OK + MB_ICONINFORMATION);
??? end;
??? procedure TForm1.Button2Click(Sender: TObject);
??? begin
????? if OpenDialog1.Execute then
????? begin
??????? try
????????? adoconnection1.Connected:=false;
????????? adoconnection1.ConnectionString:='Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=master;Data Source=FRIEND-YOFZKSCO;'+
????????? 'Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=FRIEND-YOFZKSCO;Use Encryption for Data=False;Tag with column collation when possible=False';
????????? adoconnection1.Connected:=true;
????????? with adoQuery1 do
????????? begin
??????????? Close;
??????????? SQL.Clear;
??????????? SQL.Add('Restore DataBase sfa from disk ='''+opendialog1.FileName+'''');
??????????? ExecSQL;
???????? end;
?????? except
???????? ShowMessage('???′꧰ü');
???????? Exit;
?????? end;
???? end;
???? Application.MessageBox('1§?2?ú￡?êy?Y???′3é1|','ìáê?',MB_OK + MB_ICONINFORMATION);
??? end;

(9).查找局域网上的sqlserver报务器。
??? uses Comobj;
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
??? SQLServer:Variant;
??? ServerList:Variant;
??? i,nServers:integer;
??? sRetValue:String;
??? begin
????? SQLServer := CreateOleObject('SQLDMO.Application');
????? ServerList:= SQLServer.ListAvailableSQLServers;
????? nServers:=ServerList.Count;
????? for i := 1 to nservers do
????? ListBox1.Items.Add(ServerList.Item(i));
????? SQLServer:=NULL;
????? serverList:=NULL;
??? end;
(10).窗体打开时的淡入效果。
??? procedure TForm1.FormCreate(Sender: TObject);
??? begin
????? AnimateWindow (Handle, 400, AW_CENTER);
??? end;
(11).动态创建窗体。
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? try
??????? form2:=Tform2.Create(self);
??????? form2.ShowModal;
????? finally
??????? form2.Free;
????? end;
??? end;
??? procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
??? begin
????? action:=cafree;
??? end;
??? procedure TForm1.FormDestroy(Sender: TObject);
??? begin
????? form1:=nil;
??? end;
(12).复制文件。
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? try
????? copyfileA(pchar('C:/AAA.txt'),pchar('D:/AAA.txt'),false);
????? except
????? showmessage('sfdsdf');
????? end;
??? end;
(13).复制文件夹。
??? uses shellAPI;
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
?????? lpFileOp: TSHFileOpStruct;
??? begin
????? with lpFileOp do
????? begin
??????? Wnd:=Self.Handle;
??????? wfunc:=FO_COPY;
??????? pFrom:=pchar('C:/AAA');
??????? pTo:=pchar('D:/AAA');
??????? fFlags:=FOF_ALLOWUNDO;
??????? hNameMappings:=nil;
??????? lpszProgressTitle:=nil;
??????? fAnyOperationsAborted:=True;
???? end;
???? if SHFileOperation(lpFileOp)<>0 then
???? ShowMessage('删除失败');
??? end;
(14).改变Dbgrid的选定色。
??? procedure TForm1.DBGrid1DrawDataCell(Sender: TObject; const Rect: TRect;
??? Field: TField; State: TGridDrawState);
??? begin
????? if gdSelected in state then
????? SetBkColor(dbgrid1.canvas.handle,clgreen)
????? else
????? setbkcolor(dbgrid1.canvas.handle,clwhite);
????? dbgrid1.Canvas.TextRect(rect,0,0,field.AsString);
????? dbgrid1.Canvas.Textout(rect.Left,rect.Top,field.AsString);
??? end;
(15).检测系统是否已安装了ADO。
??? uses registry;
??? function Tform1.ADOInstalled:Boolean;
??? var
??? r:TRegistry;
??? s:string;
??? begin
????? r := TRegistry.create;
????? try
????? with r do
????? begin
??????? RootKey := HKEY_CLASSES_ROOT;
??????? OpenKey( '/ADODB.Connection/CurVer', false );
??????? s := ReadString('');
??????? if s <> '' then Result := True
??????? else Result := False;
??????? CloseKey;
????? end;
????? finally
?????? r.free;
????? end;
??? end;
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
???? if ADOInstalled then showmessage('this computer has installed ADO');
??? end;
(16).取利主机的ip地址。
??? uses winsock;
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
??? IP:string;
??? IPstr:String;
??? buffer:array[1..32] of char;
??? i:integer;
??? WSData:TWSAdata;
??? Host:PHostEnt;
??? begin
????? if WSAstartup(2,WSData)<>0 then
????? begin
??????? showmessage('WS2_32.DLL3?ê??ˉ꧰ü.');
??????? exit;
????? end;
????? try
??????? if GetHostname(@buffer[1],32)<>0 then
??????? begin
????????? showmessage('??óDμ?μ??÷?ú??.');
??????? exit;
????? end;
????? except
??????? showmessage('??óD3é1|·μ???÷?ú??');
??????? exit;
????? end;
????? Host:=GetHostbyname(@buffer[1]);
????? if Host=nil then
????? begin
??????? showmessage('IPμ??·?a??.');
??????? exit;
????? end
????? else
????? begin
??????? edit2.Text:=Host.h_name;
??????? edit3.Text:=chr(host.h_addrtype+64);
??????? for i:=1 to 4 do
??????? begin
???????? IP:=inttostr(ord(host.h_addr^[i-1]));
???????? if i<4 then
???????? ipstr:=ipstr+IP+'.'
??????? else
???????? edit1.Text:=ipstr+ip;
??????? end;
?????? end;
?????? WSACleanup;
??? end;
(17).取得计算机名。
??? function tform1.get_name:string;
??? var? ComputerName: PChar;? size: DWord;
??? begin
??????? GetMem(ComputerName,255);
??????? size:=255;
??????? if GetComputerName(ComputerName,size)=False then
?????????? result:=''
??????? else
?????????? result:=ComputerName;
??????? FreeMem(ComputerName);
??? end;
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? label1.Caption:=get_name;
??? end;

(18).取得硬盘序列号。
??? function tform1.GetHDSerialNumber: LongInt;
??? {$IFDEF WIN32}
??? var
????? pdw : pDWord;
????? mc, fl : dword;
??? {$ENDIF}
??? begin
????? {$IfDef WIN32}
????? New(pdw);
????? GetVolumeInformation('c:/',nil,0,pdw,mc,fl,nil,0);
????? Result := pdw^;
????? dispose(pdw);
???? {$ELSE}
????? Result := GetWinFlags;
????? {$ENDIF}
??? end;
??? procedure TForm1.Button1Click(Sender: TObject);
??? begin
????? edit1.Text:=inttostr(gethdserialnumber);
??? end;
(19).限定光标移动范围。
??? procedure TForm1.Button1Click(Sender: TObject);
??? var
??? rect1:trect;
??? begin
????? rect1:=button2.BoundsRect;
????? mapwindowpoints(handle,0,rect1,2);
????? clipcursor(@rect1);
??? end;
??? procedure TForm1.Button2Click(Sender: TObject);
??? var
??? screenrect:trect;
??? begin
????? screenrect:=rect(0,0,screen.Width,screen.Height);
????? clipcursor(@screenrect);
??? end;
(20).限制edit框只能输入数字。
??? procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
??? begin
????? if not (key in ['0'..'9','.',#8]) then
????? begin
??????? key:=#0;
??????? Messagebeep(0);
????? end;
??? end;
(21).dbgrid中根据任一条件某一格变色。
??? procedure TForm_main.DBGridEh1DrawColumnCell(Sender: TObject;
??? const Rect: TRect; DataCol: Integer; Column: TColumnEh;
??? State: TGridDrawState);
??? begin
????? if (trim(DataModule1.ADOQuery1.FieldByName('dczt').AsString)='OK') then
????? begin
??????? if datacol=6 then
??????? begin
????????? DbGrideh1.Canvas.Brush.Color:=clGradientActiveCaption;
????????? DbGrideh1.DefaultDrawColumnCell(Rect,datacol,column,state);
??????? end;
????? end;
??? end;
(22).打开word文件。
??? procedure TfjfsglForm.SpeedButton4Click(Sender: TObject);
??? var
??? MSWord: Variant;
??? str:string;
??? begin
????? if trim(DataModule1.adoquery27.fieldbyname('fjmc').asstring)<>'' then
????? begin
??????? str:=trim(DataModule1.ADOQuery27.fieldbyname('fjmc').AsString);
??????? MSWord:= CreateOLEObject('Word.Application');//
??????? MSWord.Documents.Open('d:/Program Files/Common Files/Sfa/'+str, True);//
??????? MSWord.Visible:=1;//
??????? str:='';
??????? MSWord.ActiveDocument.Range(0, 0);//
??????? MSWord.ActiveDocument.Range.InsertAfter(str);//?úWord?D???ó×?·?'Title'
??????? MSWord.ActiveDocument.Range.InsertParagraphAfter;
????? end
????? else
????? showmessage('');
??? end;
(23).word文件传入和传出数据库。
??? uses IdGlobal;
??? procedure TdjhyForm.SpeedButton2Click(Sender: TObject);
??? var
??? sfilename:string;
??? function BlobContentTostring(const Filename:string):string;
??? begin
????? with Tfilestream.Create(filename,fmopenread)? do
????? try
??????? setlength(result,size);
??????? read(pointer(result)^,size);
????? finally
??????? free;
????? end;
??? end;
??? begin
????? if opendialog1.Execute then
????? begin
??????? sfilename:=opendialog1.FileName;
??????? DataModule1.ADOQuery14.Edit;
??????? DataModule1.ADOQuery14.FieldByName('word').AsString:=blobcontenttostring(sfilename);
??????? DataModule1.ADOQuery14.Post;
????? end;
??? end;
??? procedure TdjhyForm.SpeedButton1Click(Sender: TObject);
??? var
??? sfilename:string;
??? bs:Tadoblobstream;
??? begin
????? bs:=Tadoblobstream.Create(TBLOBfield(DataModule1.ADOQuery14.FieldByName('word')),bmread);
????? try
??????? sfilename:=extractfilepath(application.ExeName)+trim(DataModule1.adoquery14.fieldbyname('hybh').AsString);
??????? sfilename:=sfilename+'.'+'doc';
??????? bs.SaveToFile(sfilename);
??????? try
????????? djhyopenform:=Tdjhyopenform.Create(self);
????????? djhyopenform.olecontainer1.CreateObjectFromFile(sfilename,false);
????????? djhyopenform.OleContainer1.Iconic:=true;
????????? djhyopenform.ShowModal;
??????? finally
????????? djhyopenform.Free;
??????? end;
????? finally
??????? bs.free;
????? end;
??? end;
(24).中文标题的提示框。
??? procedure TdjhyForm.SpeedButton5Click(Sender: TObject);
??? begin
????? if Application.MessageBox('', Mb_YesNo + Mb_IconWarning) =Id_yes then DataModule1.ADOQuery14.Delete;
??? end;
(25).运行一应用程序文件。
??? WinExec('HH.EXE D:/Program files/common files/MyshipperCRM e-sales help/MyshipperCRM e-sales help.chm',SW_NORMAL);