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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