Correction: SET EXCLUSIVE is scoped to the current datasession. That means that if your forms use a private datasession (I do hope they do!), you must somehow invoke SET EXCLUSIVE OFF for each form. This is best done through inheritance.
Hilmar.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)