菜单Check标志设定方法。。

// TODO: Add your command handler code here CWnd* pMain = AfxGetMainWnd();  // The main window _can_ be NULL, so this code // does not ASSERT and actually tests. if (pMain != NULL) {  // Get the main window's menu.  CMenu* pMenu = pMain->GetMenu();    // If there is a menu and it has items, we will  // delete the first one.  if (pMenu != NULL && pMenu->GetMenuItemCount() > 0)  {   if (MF_UNCHECKED == pMenu->GetMenuState(ID_MAINDLG_MINIMIZE, MF_BYCOMMAND) )   {    pMenu->CheckMenuItem(ID_MAINDLG_MINIMIZE, MF_BYCOMMAND | MF_CHECKED);    SwitchToFlag = 1;  //SwitchToFlag为1,则在执行“切换至”操作时，任务管理器最小化   }   else   {    SwitchToFlag = 0;    pMenu->CheckMenuItem(ID_MAINDLG_MINIMIZE, MF_BYCOMMAND | MF_UNCHECKED);   }  }   }