How is error handling done in a form/pageframe/control environment?

I tried to call an error handler from the form.error(), but it didn't fire when the form's control crashed. When i moved the handler to the control's error() procedure, it worked.

This application is usually running after i've left for the day, and would like to record errors in a file for examination later. I don't want to have to put code in every control's error routine. (i have overloaded the form way too much to make that feasible)

How can i write one error handler and have it called by errors anywhere in the form, without specifically adding the call to each control's error() routine?