mfc控件透明

来源：http://www.cnblogs.com/emyueguang/archive/2011/05/24/2055198.html ，感谢原作者

这种方法只适用于下面这些控件

• CTLCOLOR_BTN   Button control
• CTLCOLOR_DLG   Dialog box
• CTLCOLOR_EDIT   Edit control
• CTLCOLOR_LISTBOX   List-box control
• CTLCOLOR_MSGBOX   Message box
• CTLCOLOR_SCROLLBAR   Scroll-bar control
• CTLCOLOR_STATIC   Static control

  

   //
    1. 在对话框的头文件中加入
   

   afx_msg HBRUSH OnCtlColor(CDC
   *
    pDC, CWnd
   *
    pWnd, UINT nCtlColor);


   //
    2. 在对话框的cpp文件中加入
   

   BEGIN_MESSAGE_MAP(CtransparentDlg, CDialog)
    ON_WM_CTLCOLOR()
    
   //
   }}AFX_MSG_MAP
   

   END_MESSAGE_MAP()

HBRUSH CtransparentDlg::OnCtlColor(CDC
   *
    pDC, CWnd
   *
    pWnd, UINT nCtlColor)
{
    HBRUSH   hBrush   
   =
      CDialog::OnCtlColor(pDC,   pWnd,   nCtlColor);   

    
   if
   (nCtlColor 
   ==
    CTLCOLOR_STATIC)
    {
        pDC
   ->
   SetBkMode(TRANSPARENT);   
        
   return
      (HBRUSH)::GetStockObject(NULL_BRUSH);   
    }
    
   return
    hBrush;
}