What would be a good way to escape entry in a form?

I am currently trying toi put code in the Keypress event of a certain field, so that if the user hits the ESCAPE key, that the data entry form will close up (go gray) and will execute the ThisForm.cmdCancel.Click() method.

However, it appears that you can't do this as easily as I had thought. I received an error in which I was told by FoxPro (VFP 7) that you can't use the ThisForm.cmdCancel.Click method.

The specific error was:

"ThisForm can only be used from within a form."

Any ideas?