Re: How do I display an image as the background in CMDIFrameWnd

"AliR \(VC++ MVP\)" <AliR@online.nospam>
Thu, 22 Mar 2007 17:45:09 GMT
You will have to subclass the m_hWndMDIClient of the CMDIFrameWnd with your
own window and then catch the WM_ERASEBKGND and WM_PAINT messages there.

So create class that inherits from CWnd, lets call it CClientWnd. Then
subclass m_hWndMIDClient in the Frame's OnCreateClient method. Take over
the WM_ERASEBKGND message and paint your bitmap there and return TRUE. If
you bitmap won't takeup the entire client area then you might want to it in

class CClientWnd : public CWnd

   virtual ~CClientWnd();

   afx_msg BOOL OnEraseBkgnd(CDC* pDC);


BOOL CClientWnd::OnEraseBkgnd(CDC* pDC)
   //draw bitmap here

   return TRUE;

class CMainFrame : public CMDIFrameWnd
   CClientWnd m_Client;

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*
   if (CMDIFrameWnd::OnCreateClient(lpcs, pContext))
      return TRUE;
   return FALSE;


"Bruce" <bwolven@nospam.nospam> wrote in message

I have a VC++ MFC 7.1 application and I am looking for a way to display a
background image in the application's frame window behind any child windows
that may be displayed. It is a CMDIFrameWnd derived class.

I have found a couple of examples that are to change the background color
in the CMyMDIFrameWnd::OnEraseBkgnd() handler.

But it doesn't seem to work. The background color always remains the same.

Is there something that I am missing?

I am running on Windows XP Professional.

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