>It is not that the Activate event is not working. The thing is, the event also fires when I move to another window then return to the original.

Ahh! I see. In that case, you can create a custom class and then put it on each of your pages that has the code you want in its UIEnable(). You'll probably want to add the pages at runtime so it doesn't matter if you do the class visually or in code. That will not fire each time the form is deactivated.