获取鼠标在屏幕上的坐标和颜色值(RGB)

xxxFun{
UINT bIsCheck = IsDlgButtonChecked(IDC_ONOFF);
if (bIsCheck)
{
SetTimer(1, 100, NULL);	//设置定时器(ID为1)
SetWindowPos(&CWnd::wndTopMost, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE ); // 设置窗口位置
}
else
{
KillTimer(1); // 关闭ID为1的定时器
SetWindowPos(&CWnd::wndTopMost, 0, 0, 0, 0, SWP_NOSIZE|SWP_NOMOVE);
}
}
void CGetScreenPixel::OnTimer(UINT_PTR nIDEvent)
{
CDialog::OnTimer(nIDEvent);
CPoint point;
::GetCursorPos(&point);	// 获取鼠标位置(基于全屏幕)
m_xPos = point.x;
m_yPos = point.y;
UpdateData(FALSE);

CClientDC dc(NULL);
COLORREF color =  dc.GetPixel(point); // 获取鼠标位置的颜色值
m_R = color&0xFF;
m_G = (color>>8)&0xFF;
m_B = (color>>16)&0xFF;
UpdateData(FALSE);
}