Force ShellExecute to run and wait for completion with elevated privileges in Delphi

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function RunAsAdminAndWaitForCompletion(hWnd: HWND; filename: string; Parameters: string): Boolean;
{
    See Step 3: Redesign for UAC Compatibility (UAC)
    http://msdn.microsoft.com/en-us/library/bb756922.aspx
}
var
    sei: TShellExecuteInfo;
    ExitCode: DWORD;
begin
    ZeroMemory(@sei, SizeOf(sei));
    sei.cbSize := SizeOf(TShellExecuteInfo);
    sei.Wnd := hwnd;
    sei.fMask := SEE_MASK_FLAG_DDEWAIT or SEE_MASK_FLAG_NO_UI or SEE_MASK_NOCLOSEPROCESS;
    sei.lpVerb := PChar('runas');
    sei.lpFile := PChar(Filename); // PAnsiChar;
    if parameters <> '' then
        sei.lpParameters := PChar(parameters); // PAnsiChar;
    sei.nShow := SW_SHOWNORMAL; //Integer;

   if ShellExecuteEx(@sei) then begin
     repeat
       Application.ProcessMessages;
       GetExitCodeProcess(sei.hProcess, ExitCode) ;
     until (ExitCode <> STILL_ACTIVE) or  Application.Terminated;
   end;
end;

Source:
* http://delphi.about.com/od/windowsshellapi/a/executeprogram.htm

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