用整个桌面填充全屏对话框背景

 BOOL CCatchScreenDlg::OnEraseBkgnd(CDC* pDC)
{
 // TODO: Add your message handler code here and/or call default
//**************************************************************************************
 //用整个桌面填充全屏对话框背景
 BITMAP bmp;
 m_pBitmap->GetBitmap(&bmp);

 CDC dcCompatible;
 dcCompatible.CreateCompatibleDC(pDC);

 dcCompatible.SelectObject(m_pBitmap);

 CRect rect;
 GetClientRect(&rect);
 pDC->BitBlt(0,0,rect.Width(),rect.Height(),&dcCompatible,0,0,SRCCOPY);

 return TRUE;
//**************************************************************************************
 //return CDialog::OnEraseBkgnd(pDC);
}