Closing subforms with main forms activate event.

[xollef]

I have a main form which has many buttons on it which open other forms. What I want is an on activate event for the main form that will close all other forms open no matter what their names are and then after the event the mainform would be the only one open anymore.

Any ideas?

There are the possibility of having 89 different forms open. So as not to get mixed up they should always close when you move your focus to the mainform.