Vantage 6.1 4GL Widget properties

Hello group
I have a vbform with a .p that runs on the form entry event and currently displays a message box. Instead of a message I would like to change the attribute of a button on the form. I have a button_1 and can't figure out how to change its color or any of its properties like perhaps its label using a .p program. I think I need the widgets handle but I don't know what it is. Any one out there ever do something like this.
TIA
Mark D