若要改变CView，CFrameWnd或CWnd对象的背景颜色需要处理WM_ERASEBKGND消息，下面就是一个范例代码：

BOOL CSampleView::OnEraseBkgnd(CDC* pDC)
{

//设置brush为希望的背景颜色
CBrush backBrush(RGB(255, 128, 128));

//保存旧的brush
CBrush* pOldBrush = pDC->SelectObject(&backBrush);
CRect rect;
pDC->GetClipBox(&rect);

//画需要的区域
pDC->PatBlt(rect.left, rect.top, rect.Width(), rect.Height(), PATCOPY);
pDC->SelectObject(pOldBrush);

return TRUE;

}

若要改变CFromView继承类的背景颜色，下面是一个范例代码：

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

switch (nCtlColor)
{

case CTLCOLOR_BTN:
case CTLCOLOR_STATIC:
{

pDC->SetBkMode(TRANSPARENT);
//不加任何处理或设置背景为透明

}
case CTLCOLOR_DLG:
{

CBrush* back_brush;
COLORREF color;
color = (COLORREF) GetSysColor(COLOR_BTNFACE);
back_brush = new CBrush(color);
return (HBRUSH) (back_brush->m_hObject);

}

}

return(CFormView::OnCtlColor(pDC, pWnd, nCtlColor));

}