[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;