>Hmmm. This is very interesting because the code that I posted was from a class in an old production application and the client has never complained of a problem. I just re-tested with a form that contained a pageframe with 2 pages, an option group, a combo box, a list box, a command group, a command button and 2 grids. The code worked flawlessly.
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>Did you have something else on your form that is not in the list above?

My form have 1 spinner, 1 editbox, 3 checkbox and 1 containner also! BTW, it will be no harm done to add that code [IF TYPE('toControl')#'O'.....] also, right?