MFC joins background image and makes control background transparent

/* Add background image */
BOOL ctooldlg::onerasebkgnd (cdc* pDC)
{
 //TODO: Add Message Handler code here and/or call default value
 cdialog::onerasebkgnd (pDC);
 HBITMAP   m_hbitmap;
 HDC           m_hbkdc;
 m_hBitmap   =  :: loadbitmap (:: getmodulehandle (NULL), makeintresource (idb_bitmap2)) ;
 m_hBkDC     =  :: CreateCompatibleDC (pdc-> m_hdc);
 if (m_hbitmap   &&   m_hbkdc)
 {
 :: SelectObject (m_hbkdc,m_ hbitmap);
 :: StretchBlt (pdc-> m_hdc,0,0,700,610,m_hbkdc,0,0,700,610,srccopy);
 ::D Eleteobject (m_hbitmap);
 ::D Eletedc (m_hbkdc);
 }

Return TRUE;
}

/* set control background transparent */
Hbrush ctooldlg::onctlcolor (cdc* pDC, cwnd* pWnd, UINT nctlcolor)
{
Hbrush HBR = Cdialogex::onctlcolor (pDC, pWnd, nctlcolor);

if (nctlcolor = = Ctlcolor_static)
{
Pdc->setbkmode (TRANSPARENT);//set Background Transparency
Pdc->settextcolor (RGB (255,255,0));//set the font to yellow
return (hbrush):: Getstockobject (null_brush);
}

TODO: Assuming that the default is not the desired brush, return a brush
Return hbr;
}

Achieve effects such as what you see:

Transferred from: http://www.2cto.com/kf/201305/210038.html

MFC joins background image and makes control background transparent