Hi,
did you run the test code suggested?

? o.column1.RemoveObject('header1')
? o.column1.ControlCount && 1 - header was removed

>>

>>o = CreateObject('grid')
>>o.ColumnCount = 1
>>? o.column1.RemoveObject('header1')
>>? o.column1.ControlCount
>>? o.column1.AddObject('header1','someHeaderClass')
>>? o.column1.ControlCount
>>

>>
>>Tested OK with VFP9, don't know about VFP7
>
>IIRC this worked fine with VFP7 as well.
>
>The .removeObject() line is unnecessary, I think, because the grid always has one and only one header, so if you remove it, a new one is created automatically, and if you add one, the old one is removed. It's possible that there's a predefined slot for a header which simply holds a baseclass header unless filled with something else.
>
>Not true anymore - you can have a headerless column and if you try to add a header it will complain if it already has one (so my "single slot for header" theory still holds some ground). So the above paragraph may have applied to some earlier version of fox - 6 or 7 or thereabouts.