How do I close a form when a user clicks outside the form's window?

Question

I want to close a System.Windows.Forms.Form if the user clicks anywhere outside it. I\'ve tried using IMessageFilter, but even then none of the messages are passed to PreFi

Answer 1

With thanks to p-daddy in this question, I've found this solution which allows me to use ShowDialog:

protected override void OnShown(EventArgs e)
{
    base.OnShown(e);
    this.Capture = true;
}

protected override void OnCaptureChanged(EventArgs e)
{
    if (!this.Capture)
    {
        if (!this.RectangleToScreen(this.DisplayRectangle).Contains(Cursor.Position))
        {
            this.Close();
        }
        else
        {
            this.Capture = true;
        }
    }

    base.OnCaptureChanged(e);
}