Had this today... and felt a strong deja vu - so I found this thread and, well, back then I was in VFP7, now I'm in VFP8, and the bug is still there.

And the same workaround still works.

>>>I've had this yesterday, and now a colleague called me with the same problem.
>>>
>>>A combo is set like this:
>>>
>>>

This.ControlSource="this.parent.nGroup_no"
>>>This.RowSourceType= 6
>>>This.BoundColumn=2
>>>This.Style=2
>>>This.RowSource="groups.descript,group_no"
>>>This.BoundTo= .T.
>>>This.ColumnWidths=Transform(This.Width)+",0"

>>>
>>>Symptoms: there is never a displayvalue. In the debugger and in code it is always an empty string. Visually, it looks as if disabled. The dropdown does show the list, and if selected, the value gets into combo.value and into this.parent.nGroup_no. The displayvalue remains "".