G Guest Feb 6, 2006 #2 On the after update event of the Combo 1, you can write in the code section Me.[Combo 2 Name].Locked = Not (IsNull(Me.[Combo 1 Name]))
On the after update event of the Combo 1, you can write in the code section Me.[Combo 2 Name].Locked = Not (IsNull(Me.[Combo 1 Name]))