Question

I have few controls (Label, Custom Textbox, Datagridview) docked on a form. When I tried to hook the MouseMove event to the individual controls, the event fires perfectly fine but when I tried to hook the event on the form itself, the mousemove event do not respond at all. What could be the possible cause of this?

Edit:

Here is the event hook from resources.cs

this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.LogicSimulationViewerForm_MouseMove);

and here is the function handled on catching the event

private void LogicSimulationViewerForm_MouseMove(object sender, MouseEventArgs e)
        {
           //DOESN'T WORK!!!
        }

Answer 1

The cause of this is that in difference of WPF in WindowsForms the event is “blocked” by the control that handled it (in WPF the event will be pushed to the parent up to the Visual Tree, or in opposite direction: from parent to child).

So to catch that event you need to process it on application level and do not subscribe to single control event.

For more detailed example how to handle it can look here:

How do I capture the mouse mouse move event in my winform application