SDK方式下的退出窗口提示

退出窗口前询问“是否要退出当前窗口”

 BOOL Cls_OnQueryEndSession (HWND hwnd) 

{
       BOOL fOKToEndSession = TRUE;
          if (g_fIsDataUnsaved) 

        {
 int n = MessageBox(hwnd, "Do you want to save changes?",
"Application caption", MB_YESNOCANCEL│MB_ICONWARING);
           if (n == IDYES) 

{
         }
          if (n == IDCANCEL)
      fOKToEndSession = FALSE;
       }
   return(fOKToEndSession);
}


 void Cls_OnEndSession (HWND hwnd, BOOL fEnding) {
      if (fEnding) 

         {
        DestroyWindow(hwnd); 

         }
}


 void Cls_OnDestroy (HWND hwnd) 

{
    PostQuitMessage(0);
}
 void Cls_OnClose (HWND hwnd) 

{ 

    BOOL fOKToClose = Cls_OnQueryEndSession(hwnd); 
    Cls_OnEndSession(hwnd, fOKToClose);
}