MFC 多文檔如何更改主框體體的背景，把灰色的背景改為圖片？

在.h中定義畫刷

CBrush m_brBk;

BOOL CUsrLogin::OnInitDialog()

{

CDialog::OnInitDialog();

CBitmap bmp;

bmp.LoadBitmap(IDB_BITMAP1);

m_brBk.CreatePatternBrush(&bmp);

bmp.DeleteObject();

return TRUE; // return TRUE unless you set the focus to a control

// EXCEPTION: OCX Property Pages should return FALSE

}

HBRUSH CUsrLogin::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)

{

HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

if (pWnd == this)

{

return m_brBk;

}

return hbr;

}