Question

I have a UserControl on a Form,
when I MouseMove on that UserControl I want to do something in the Form.

How can I make the Form ‘listen’ for this event?

I am using Visual C#, .Net framework 3.5, winforms

Answer 1

I suppose you’re referring to a use control or something like that.

You can add a public event, and trigger it inside your class when detecting the inner class event.

Then you have to subscribe to the published event in the second class.

This is a sample so that you see the sintax:

    public class WithEvent
    {
        // this is the new published event
        public EventHandler<EventArgs> NewMouseEvent;

        // This handles the original mouse event of the inner class
        public void OriginalEventhandler(object sender, EventArgs e)
        {
            // this raises the published event (if susbcribedby any handler)
            if (NewMouseEvent != null)
            {
                NewMouseEvent(this, e);
            }
        }
    }

    public class Subscriber
    {
        public void Handler(object sender, EventArgs e)
        {
            // this is the second class handler
        }

        public void Subscribe()
        {
            WithEvent we = new WithEvent();
            // This is how you subscribe the handler of the second class
            we.NewMouseEvent += Handler;
        }

    }