Hi Mike,

I did a simple test here and works. I had problem (not the same problem that you have) only when in my column class ou header class (into .prg) I used "This." when I would like of to change a property. If you be using "This." try delete it.
P.S.: In my case (problem) VFP said: "Unknown member THIS". Somehow, "This." isn't necessary.
Good luck!



>I have a grid class that uses the MemberClassLibrary and MemberClass properties. The MemberClassLibrary points to a prg where the column class is defined and it in turn relies on a HeaderClass that is also in the same prg.
>
>I then drop this grid class on to a container class and set the column count to 2. The two columns appear as expected (using my MemberClass) and their headers are using the HeaderClass (again as expected).
>
>Now when I try to drop this container onto a form class, I receive the following error:
>
>"Cannot add this object to a grid"
>
>My only options are OK and Help. The help says:
>
>"You have attempted to execute the Grid.AddObject method to add an object other than a column to the grid.
>
>You are trying to add an object to a column, rather than adding a column to the grid.
>
>To add an object to a column, use the Grid.Column syntax with the AddObject method."
>
>Any idea where I went wrong?
>
>Thanks for all replies,
>Mike