Hi Patrick,
Thank you for your reply. I have a database of minerals and a subform for their yearly gradation results. My boss wants me to add a previous year's gradation result on the subform so they can easily compare results.
So, what I did was to add another subform (within a subform), so when I choose the year I want to view from the combobox, that year's data will appear on the subform and at the
same time show the previous year's data on the other subform. But for some reason, I cannot connect my combobox to the second subform.