MouseHover/MouseLeave event on the whole entire window

Question

I have Form subclass with handlers for MouseHover and MouseLeave. When the pointer is on the background of the window, the events work fine, but wh

Answer 1

There is no good way to make MouseLeave reliable for a container control. Punt this problem with a timer:

public partial class Form1 : Form {
    public Form1() {
        InitializeComponent();
        timer1.Interval = 200;
        timer1.Tick += new EventHandler(timer1_Tick);
        timer1.Enabled = true;
    }

    private bool mEntered;

    void timer1_Tick(object sender, EventArgs e) {
        Point pos = this.PointToClient(Cursor.Position);
        bool entered = this.ClientRectangle.Contains(pos);
        if (entered != mEntered) {
            mEntered = entered;
            if (!entered) {
                // Do your leave stuff
                //...
            }
        }
    }
}