a problem of Mouse event with activeX

[vinhie47]

Hi everybody,

Now I countering a strange problem with mouse event. In my ActiveX control, I show a MessageBox whenever mouse move in the activeX control.
You can see it as below:

void CMyCOMCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
	
	MessageBox("moving");

	COleControl::OnMouseMove(nFlags, point);
}

It 's too normal, there isn't any unusual (of course).
Now I use this activeX in a C# application, when I move mouse over the control, certainly this message appear. But when I press left mouse button down (WM_LBUTTONDOWN) and move mouse over the control, nothing happen. I can't understand what's the problem. Could you explain it for me.

P/S: if I use this control in a VC++ application, everything go well.

Thanks in advance.

Best regards,
Vinh