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

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
WM_PAINT.

class CClientWnd : public CWnd
{
   DECLARE_DYNAMIC(CClientWnd)

public:
   CClientWnd();
   virtual ~CClientWnd();

protected:
   DECLARE_MESSAGE_MAP()
public:
   afx_msg BOOL OnEraseBkgnd(CDC* pDC);
};

BEGIN_MESSAGE_MAP(CClientWnd, CWnd)
   ON_WM_ERASEBKGND()
END_MESSAGE_MAP()

BOOL CClientWnd::OnEraseBkgnd(CDC* pDC)
{
   //draw bitmap here
   pDC->BitBlt(....);

   return TRUE;
}

class CMainFrame : public CMDIFrameWnd
{
private:
   CClientWnd m_Client;
};

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*
pContext)
{
   if (CMDIFrameWnd::OnCreateClient(lpcs, pContext))
   {
      m_Client.SubclassWindow(m_hWndMDIClient);
      return TRUE;
   }
   return FALSE;
}

AliR.

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