使用API调用Winodws各种通用对话框(Common Diaglog)的方法

使用API调用Winodws各种通用对话框(Common Diaglog)的方法（一）

1.文件属性对话框
Type SHELLEXECUTEINFO
cbSize As Long
fMask As Long
hwnd As Long
lpVerb As String
lpFile As String
lpParameters As String
lpDirectory As String
nShow As Long
hInstApp As Long
lpIDList As Long '可选参数
lpClass As String '可选参数
hkeyClass As Long '可选参数
dwHotKey As Long '可选参数
hIcon As Long '可选参数
hProcess As Long '可选参数
End Type

Const SEE_MASK_INVOKEIDLIST = &HC
Const SEE_MASK_NOCLOSEPROCESS = &H40
Const SEE_MASK_FLAG_NO_UI = &H400

Declare Function ShellExecuteEX Lib "shell32.dll" Alias "ShellExecuteEx" _
(SEI As SHELLEXECUTEINFO) As Long
Public Function ShowProperties(filename As String, OwnerhWnd As Long) As Long
'打开指定文件的属性对话框,如果返回值<=32则出错
Dim SEI As SHELLEXECUTEINFO
Dim r As Long
With SEI
.cbSize = Len(SEI)
.fMask = SEE_MASK_NOCLOSEPROCESS Or SEE_MASK_INVOKEIDLIST Or SEE_MASK_FLAG_NO_UI
.hwnd = OwnerhWnd
.lpVerb = "properties"
.lpFile = filename
.lpParameters = vbNullChar
.lpDirectory = vbNullChar
.nShow = 0
.hInstApp = 0
.lpIDList = 0
End With
r = ShellExecuteEX(SEI)
ShowProperties = SEI.hInstApp
End Function

新建一个工程,添加一个按钮和名为Text1的文本框
把以下代码置入CommandbButton_Click 中
Dim r As Long
Dim fname As String
'从Text1 中获取文件名及路径
fname = (Text1)
r = ShowProperties(fname, Me.hwnd)
If r <= 32 Then MsgBox "Error"

2.使用Win95的关于对话框
Private Declare Function ShellAbout Lib "shell32.dll" _
Alias "ShellAboutA" (ByVal hwnd As Long, ByVal szApp As String, _
ByVal szOtherStuff As String, ByVal hIcon As Long) As Long
示例:
Dim x As Long
x = shellabout (Form1.hwnd, "Visual Basic 6.0", _
"Alp Studio MouseTracker Ver 1.0", Form1.icon)

2.调用"捕获打印机端口"对话框
Private Declare Function WNetConnectionDialog Lib "mpr.dll" _
(ByVal hwnd As Long, ByVal dwType As Long) As Long
示例:
Dim x As Long
x = WNetConnectionDialog(Me.hwnd, 2)

3.调用颜色对话框
Private Type ChooseColor
lStructSize As Long
hwndOwner As Long
hInstance As Long
rgbResult As Long
lpCustColors As String
flags As Long
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type
Private Declare Function ChooseColor Lib "comdlg32.dll" Alias "ChooseColorA" (pChoosecolor As ChooseColor) As Long

将以下代码置入某一事件中:
Dim cc As ChooseColor
Dim CustColor(16) As Long
cc.lStructSize = Len(cc)
cc.hwndOwner = Form1.hWnd
cc.hInstance = App.hInstance
cc.flags = 0
cc.lpCustColors = String$(16 * 4, 0)
Dim a
Dim x
Dim c1
Dim c2
Dim c3
Dim c4
a = ChooseColor(cc)
Cls
If (a) Then
    MsgBox "Color chosen:" & Str$(cc.rgbResult)

For x = 1 To Len(cc.lpCustColors) Step 4
c1 = Asc(Mid$(cc.lpCustColors, x, 1))
c2 = Asc(Mid$(cc.lpCustColors, x + 1, 1))
c3 = Asc(Mid$(cc.lpCustColors, x + 2, 1))
c4 = Asc(Mid$(cc.lpCustColors, x + 3, 1))
CustColor(x / 4) = (c1) + (c2 * 256) + (c3 * 65536) + (c4 * 16777216)
MsgBox "Custom Color " & Int(x / 4) & " = " & CustColor(x / 4)
Next x
Else
MsgBox "Cancel was pressed"
End If

4.调用复制磁盘对话框
Private Declare Function SHFormatDrive Lib "shell32" (ByVal hwnd As Long, ByVal Drive As Long, ByVal fmtID As Long, ByVal options As Long) As Long
Private Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long

示例:
向窗体中添加一个名为Drive1的DriveListBox,将以下代码置入某一事件中
Dim DriveLetter$, DriveNumber&, DriveType&
Dim RetVal&, RetFromMsg&
DriveLetter = UCase(Drive1.Drive)
DriveNumber = (Asc(DriveLetter) - 65)
DriveType = GetDriveType(DriveLetter)
If DriveType = 2 Then 'Floppies, etc
RetVal = Shell("rundll32.exe diskcopy.dll,DiskCopyRunDll " _
& DriveNumber & "," & DriveNumber, 1) 'Notice space after
Else ' Just in case 'DiskCopyRunDll
RetFromMsg = MsgBox("Only floppies can" & vbCrLf & _
"be diskcopied!", 64, "DiskCopy Example")
End If

5.调用格式化软盘对话框
Private Declare Function SHFormatDrive Lib "shell32" (ByVal hwnd As Long, ByVal Drive As Long, ByVal fmtID As Long, ByVal options As Long) As Long
Private Declare Function GetDriveType Lib "kernel32" Alias "GetDriveTypeA" (ByVal nDrive As String) As Long
参数设置:
fmtID-
3.5"       5.25"
-------------------------
0 1.44M     1.2M
1 1.44M     1.2M
2 1.44M     1.2M
3 1.44M     360K
4 1.44M     1.2M
5 720K     1.2M
6 1.44M     1.2M
7 1.44M     1.2M
8 1.44M     1.2M
9 1.44M     1.2M

选项
0 快速
1 完全
2 只复制系统文件  
3 只复制系统文件  
4 快速
5 完全
6 只复制系统文件  
7 只复制系统文件  
8 快速
9 完全
示例:要求同上
Dim DriveLetter$, DriveNumber&, DriveType&
Dim RetVal&, RetFromMsg%
DriveLetter = UCase(Drive1.Drive)
DriveNumber = (Asc(DriveLetter) - 65) ' Change letter to Number: A=0
DriveType = GetDriveType(DriveLetter)
If DriveType = 2 Then 'Floppies, etc
RetVal = SHFormatDrive(Me.hwnd, DriveNumber, 0&, 0&)
Else
RetFromMsg = MsgBox("This drive is NOT a removeable" & vbCrLf & _
"drive! Format this drive?", 276, "SHFormatDrive Example")
Select Case RetFromMsg
Case 6 'Yes
' UnComment to do it...
'RetVal = SHFormatDrive(Me.hwnd, DriveNumber, 0&, 0&)
Case 7 'No
' Do nothing
End Select
End If
使用API调用Winodws各种通用对话框(Common Diaglog)的方法（二）

1.选择目录/文件夹对话框
将以下代码置于一模块中
Option Explicit
' 调用方式:: string = BrowseForFolders(Hwnd,TitleOfDialog)
' 例如:String1 = BrowseForFolders(Hwnd, "Select target folder...")
Public Type BrowseInfo
hwndOwner As Long
pIDLRoot As Long
pszDisplayName As Long
lpszTitle As Long
ulFlags As Long
lpfnCallback As Long
lParam As Long
iImage As Long
End Type
Public Const BIF_RETURNONLYFSDIRS = 1
Public Const MAX_PATH = 260
Public Declare Sub CoTaskMemFree Lib "ole32.dll" (ByVal hMem As Long)
Public Declare Function lstrcat Lib "kernel32" Alias "lstrcatA" (ByVal lpString1 As String, ByVal lpString2 As String) As Long
Public Declare Function SHBrowseForFolder Lib "shell32" (lpbi As BrowseInfo) As Long
Public Declare Function SHGetPathFromIDList Lib "shell32" (ByVal pidList As Long, ByVal lpBuffer As String) As Long

Public Function BrowseForFolder(hwndOwner As Long, sPrompt As String) As String
Dim iNull As Integer
Dim lpIDList As Long
Dim lResult As Long
Dim sPath As String
Dim udtBI As BrowseInfo
'初始化变量
With udtBI
.hwndOwner = hwndOwner
.lpszTitle = lstrcat(sPrompt, "")
.ulFlags = BIF_RETURNONLYFSDIRS
End With
'调用 API
lpIDList = SHBrowseForFolder(udtBI)
If lpIDList Then
sPath = String$(MAX_PATH, 0)
lResult = SHGetPathFromIDList(lpIDList, sPath)
Call CoTaskMemFree(lpIDList)
iNull = InStr(sPath, vbNullChar)
If iNull Then sPath = Left$(sPath, iNull - 1)
End If
'如果选择取消, sPath = ""
BrowseForFolder = sPath
End Function
2.调用"映射网络驱动器"对话框
Private/Public Declare Function WNetConnectionDialog Lib "mpr.dll" _
(ByVal hwnd As Long, ByVal dwType As Long) As Long
x% = WNetConnectionDialog(Me.hwnd, 1)
3.调用"打开文件"对话框
Private Type OPENFILENAME
lStructSize As Long
hwndOwner As Long
hInstance As Long
lpstrFilter As String
lpstrCustomFilter As String
nMaxCustFilter As Long
nFilterIndex As Long
lpstrFile As String
nMaxFile As Long
lpstrFileTitle As String
nMaxFileTitle As Long
lpstrInitialDir As String
lpstrTitle As String
flags As Long
nFileOffset As Integer
nFileExtension As Integer
lpstrDefExt As String
lCustData As Long
lpfnHook As Long
lpTemplateName As String
End Type
Private Declare Function GetOpenFileName Lib "comdlg32.dll" Alias "GetOpenFileNameA" (pOpenfilename As OPENFILENAME) As Long
将以下代码置于某一事件中
Dim ofn As OPENFILENAME
ofn.lStructSize = Len(ofn)
ofn.hwndOwner = Form1.hWnd
ofn.hInstance = App.hInstance
ofn.lpstrFilter = "Text Files (*.txt)" + Chr$(0) + "*.txt" + Chr$(0) + "Rich Text Files (*.rtf)" + Chr$(0) + "*.rtf" + Chr$(0)
ofn.lpstrFile = Space$(254)
ofn.nMaxFile = 255
ofn.lpstrFileTitle = Space$(254)
ofn.nMaxFileTitle = 255
ofn.lpstrInitialDir = curdir
ofn.lpstrTitle = "Our File Open Title"
ofn.flags = 0
Dim a
a = GetOpenFileName(ofn)
If (a) Then
MsgBox "File to Open: " + Trim$(ofn.lpstrFile)
Else
MsgBox "Cancel was pressed"
End If
4.调用"打印"对话框
Private Type PrintDlg
lStructSize As Long
hwndOwner As Long
hDevMode As Long
hDevNames As Long
hdc As Long
flags As Long
nFromPage As Integer
nToPage As Integer
nMinPage As Integer
nMaxPage As Integer
nCopies As Integer
hInstance As Long
lCustData As Long
lpfnPrintHook As Long
lpfnSetupHook As Long
lpPrintTemplateName As String
lpSetupTemplateName As String
hPrintTemplate As Long
hSetupTemplate As Long
End Type
Private Declare Function PrintDlg Lib "comdlg32.dll" Alias "PrintDlgA" (pPrintdlg As PrintDlg) As Long
'将以下代码置于某一事件中
Dim tPrintDlg As PrintDlg
tPrintDlg.lStructSize = Len(tPrintDlg)
tPrintDlg.hwndOwner = Me.hwnd
tPrintDlg.hdc = hdc
tPrintDlg.flags = 0
tPrintDlg.nFromPage = 0
tPrintDlg.nToPage = 0
tPrintDlg.nMinPage = 0
tPrintDlg.nMaxPage = 0
tPrintDlg.nCopies = 1
tPrintDlg.hInstance = App.hInstance
lpPrintTemplateName = "Print Page"
Dim a
a = PrintDlg(tPrintDlg)
If a Then
lFromPage = tPrintDlg.nFromPage
lToPage = tPrintDlg.nToPage
lMin = tPrintDlg.nMinPage
lMax = tPrintDlg.nMaxPage
lCopies = tPrintDlg.nCopies
PrintMyPage 'Custom printing Subroutine
End If