Question

This question is related to this my question. Now I have form in my class and when user click on button I show (or hide) form. That´s ok. But I want to hide form when I move with origin form or when I click somewhere in origin form. The new form is behind that origin form. I was trying events like lostfocus and others but It didn´t help. So I think I need some trick that check from my control if there was click in parrent form (origin form) or some other hack. I know the best would be that I put code but I have many lines so I think that best way will be if you help me in general way and then I try to applicate to my app.

Answer 1

You can do it with a global mouse and keyboard hook. In fact, its been wrapped up into well documented, well structured .NET API over at CodePlex

Go over there and download it. Then, set up a global mouse hook:

    _mouseListener = new MouseHookListener(new GlobalHooker());
    _mouseListener.MouseMove += HandleGlobalHookMouseMove;
    _mouseListener.Start();

The key here is that you will receive the MouseMove event ANY time the mouse moves ANYWHERE on the desktop, not just within the bounds of your window.

 private void HandleAppHookMouseMove(object sender, MouseEventArgs e)
 {

        if (this.Bounds.Contains(e.Location))
        {
              HandleEnter();
        }
        else
        {
              HandleLeave();
        }          
  }

You can also setup one for MouseClick. The combination of the two will enable you to determine any time the mouse moves over your origin form, or the mouse is clicked when its over it. Unlike the LostFocus and other events you tried, focus is irrelevant.