对应WM_CTLCOLOR函数

加入下面代码：

HBRUSH CMFCApplication2Dlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
        .....

	switch (pWnd->GetDlgCtrlID())
	{
	case IDC_STATIC:
	{
	     pDC->SetBkMode(TRANSPARENT);
	     pDC->SetTextColor(RGB(0, 0, 0));
	     return (HBRUSH)GetStockObject(HOLLOW_BRUSH); 
	}
	
	default:
		break;
	}

	return hbr;
}