[code]function InitializeSetup: Boolean;
var Path:string ;
ResultCode: Integer;
dotNetV4RegPath:string;
dotNetV4DownUrl:string;
dotNetV4PackFile:string;
wic:string;
begin
dotNetV4RegPath:='SOFTWARE\Microsoft\.NETFramework\policy\v4.0';
dotNetV4DownUrl:='http://download.microsoft.com/download/9/5/A/95A9616B-7A37-4AF6-BC36-D6EA96C8DAAE/dotNetFx40_Full_x86_x64.exe';
dotNetV4PackFile:='{src}\update\dotNetFx40_Full_x86_x64.exe';
wic:='{src}\update\wic_x86_chs.exe';
if RegKeyExists(HKLM, dotNetV4RegPath) then
begin
Result := true;
end
else
begin
Exec(ExpandConstant(wic), '/q /norestart', '', SW_SHOWNORMAL, ewWaitUntilTerminated, ResultCode);
if MsgBox('系统检测到您没有安装.Net Framework4.0运行环境，是否立即安装？', mbConfirmation, MB_YESNO) = idYes then
begin
Path := ExpandConstant(dotNetV4PackFile);
if(FileOrDirExists(Path)) then
begin
Exec(Path, '/q /norestart', '', SW_SHOWNORMAL, ewWaitUntilTerminated, ResultCode);
if RegKeyExists(HKLM, dotNetV4RegPath) then
begin
Result := true;
end
else
begin
MsgBox('未能成功安装.Net Framework4.0运行环境，系统将无法运行，本安装程序即将退出！',mbInformation,MB_OK);
end
end
else
begin
if MsgBox('软件安装目录中没有包含.Net Framework的安装程序，是否立即下载后安装？', mbConfirmation, MB_YESNO) = idYes then
begin
Path := ExpandConstant('{pf}\Internet Explorer\iexplore.exe');
Exec(Path, dotNetV4DownUrl , '', SW_SHOWNORMAL, ewWaitUntilTerminated, ResultCode);
MsgBox('请安装好.Net Framework4.0环境后，再运行本安装包程序！',mbInformation,MB_OK);
Result := false;
end
else
begin
MsgBox('不下载安装.Net Framework4.0运行环境，系统将无法运行，本安装程序即将退出！',mbInformation,MB_OK);
Result := false;
end
end
end
else
begin
MsgBox('没有安装.Net Framework4.0运行环境，系统将无法运行，本安装程序即将退出！',mbInformation,MB_OK);
Result := false;
end;
end;
end;
