CBrush m_brushColor;2.在onInitDialog()初始化时创建画刷，并设置实际的颜色：
m_brushColor.CreateSolidBrush ( RGB ( 100, 100, 255 ));//初始化颜色画刷3.通过类向导添加afx_msg HBRUSH onCtlColor()函数，并返回颜色刷子：
HBRUSH CxxxDlg::onCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::onCtlColor(pDC, pWnd, nCtlColor);
// TODO: Change any attributes of the DC here
if(nCtlColor ==CTLCOLOR_DLG)
return m_brushColor; //返回颜色刷子
}
