>I am wanting to change a field on a form made with the form wizard in VFP5 and I'm using VFP7 SP1 and it seems that the txtbns class is doing something special with the textboxes that exist. Their backgrounds are gray until you click on the "edit" button and then they are editable. When I want to change one of the textboxes to a combo-box and have another related table be the RecordSource for my new combo-box and the old textbox's table.field will be the new combo-box's control-source. But when I do this the buttons don't control the readonly / readwrite and other properties of this new object on the form. What can I do to fix this?

You shoudl use a combobox class from the same class library as the textbox you're replacing.