隐藏标题栏

void   CMainFrame::ShowCaptionMenu(BOOL   bShow)  
  {  
  static   HMENU   hMenu=NULL;  
  if   (hMenu   ==   NULL){  
  hMenu=::GetMenu(this->GetSafeHwnd());  
  }  
  if(bShow){  
  ::SetMenu(this->GetSafeHwnd(),hMenu);  
  this->ModifyStyle(0,WS_CAPTION,SWP_FRAMECHANGED);  
  }else{  
  ::SetMenu(this->GetSafeHwnd(),NULL);  
  this->ModifyStyle(WS_CAPTION,0,SWP_FRAMECHANGED);  
  }  
  }  
   
  调用:  
  this->ShowCaptionMenu(FALSE);   
     
  this->ShowCaptionMenu(TRUE);