Naomi,

>I've specified DEFAULT for one of my fields as cEntered_by C(10) DEFAULT GetUserID()
>However, when I try APPEND BLANK, my field is not getting populated.

It works for me in VFP9. How about putting a WAIT WINDOW or SET STEP ON at the top of your GetUserID() function, then try it and see if it gets called at all? If so, step through it and be sure it's returning something.

When you say you specified the default, I assume you mean that you included

cEntered_by C(10) DEFAULT GetUserID()

in the CursorSchema property? Are you sure the CursorSchema is being used? Are you including the parameter on the CursorFill call that specifies that CursorSchema is to be used?