IC_HAPPY1

我在界面建立了一个Button控件，向实现一下拖动Button到界面的任意位置！
我的思想是

void CMy1Dlg::OnLButtonDown(UINT nFlags, CPoint point)  
{
        这里我觉得应该填写半段是不是点击的Button?但是代吗总是写错!!
CDialog::OnLButtonDown(nFlags, point);
}
void CMy1Dlg::OnMouseMove(UINT nFlags, CPoint point)  
{
       这里不断的跟着鼠标刷新位置！！！
        CDialog::OnMouseMove(nFlags, point);
}


void CMy1Dlg::OnLButtonUp(UINT nFlags, CPoint point)  
{
   这里要实现返回Button的位置！！！
CDialog::OnLButtonUp(nFlags, point);
}
请教各位代码如何编写啊 ？？？？拜谢！！！！！！

Nothing

::OnMouseMove(UINT nFlags, CPoint point)
nFlags里有按键的信息，看MSDN中关于nFlags的说明
nFlags
Indicates whether various virtual keys are down. This parameter can be any combination of the following values:
MK_CONTROL   Set if the CTRL key is down.
MK_LBUTTON   Set if the left mouse button is down.
MK_MBUTTON   Set if the middle mouse button is down.
MK_RBUTTON   Set if the right mouse button is down.
MK_SHIFT   Set if the SHIFT key is down.