Notification for when the Material has changed

I'm writing a VBA program to update a couple of custom properties when the material feature get updated.  I have the program written but I have to run in manually after the material has been changed.  Is there a way to add a notification that watches for the material to be changed and run this program?  The only command that I see that might work is PartDoc.FeatureEditPreNotify.  Thank you.

SolidworksApi macros