C++程序设计 mousemove消息在标题栏显示当前鼠标的坐标，按LEFT键，弹出messagebox.

void CceshiDlg::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
Cpoint tp=point;
ClientToScreem(&tp);
CString str;
str.Format("x=%d y=%d",tp.x,tp.y);