Standard way of tracking dynamically created forms?

[Guest]

I have a main form that can create and display multiple other (sub)forms at
the click of a button. Each time a new subform is created, I want the main
form to increment a counter to indicate how many forms of that type are
active in memory. But in order for this to work, I need to be able to
decrement the counter when a subform is closed using the subform's x control.

I'm sure this is frequently done, so I am interested to learn how this is
typically/best accomplished.

Thanks.

 

[Guest]

You could keep a static Hashtable in the main form, adding or subtracting an
entry for each "subform" when they are created or destroyed.
Peter