Resource OnChange trigging itself

[Marty Phee]

Problem: In the OnChange event I'm creating a custom field for a resource if
it doesn't already exist. Well, this is triggering the OnChange event again.

Anyone else run into this problem? How did you handle it?

Of course if I have the Resource checked out it throws an exception if I try
to check them out again, but I would like to find a cleaner solution if
possible.

thank,

Marty