>>Mystery solved. The value of _screen.oApp.iPrimaryKey was getting changed after the Init and the SELECT of the combo, but before the toolbar displayed. The solution was to requery the combo immediately after the value was changed.
>>
>>And to think I spent half a day at that...
>>
>>* cSteve
>
>Great. Now why didn't I read THIS message before the one I answered first? :-)
>
>Barbara

I know, I 've done that, too. But you were on the right track :-)

* cSteve