>I have a form using several (many) instances of the textbox class. I have now created my own subclass of the textbox. I would like to automate the process of changing the class names. Is this possible? If so, how exactly do I do this? TIA.

Get VFP hacking tool from http://www.visionpace.com/VMPSite/VFP/default.asp. Don't forget to backup your class libraries before hacking them.