i dont seem to be able to drag fields in a form onto a tab control. usually when you use a tab control it is highlighted, but i cant drag fields onto it. is there any way of doing it??
I have found that when adding fields to a tab control you have to directly drag the fields from the field list to the tab control itself. Fields that are already on the form and you try to drag them to the tab control doesn't seem to work as you are now experiencing.
Go to view menu field list and drag your fields from here to the tab control.