Question

How to prevent my “About-Form” (no input-boxes, OK-button only) from losing focus, to force the user to click “OK”? I tried Validation and ErrorProvider. I tried also to delegate Show, Activate and Focus like this:

AboutForm myAboutForm = new AboutForm();
myAboutForm.Deactivate += delegate { myAboutForm.Show(); myAboutForm.Activate(); };
myAboutForm.Show();

but nothing works.

Answer 1

Make your about form a Modal window dialog.

AboutForm myAboutForm = new AboutForm();
myAboutForm.ShowDialog();

From MSDN – ShowDialog:

Shows the form as a modal dialog box.