I need to clarify. I have a subform which is set to cycle current record. On the subform, in addition to several data entry controls, is a tab control with 4 tab pages. One page is add only, one page is delete only, one page is edit only, and one page is locked and used for viewing data only. When in the edit page, which has only one editable control, a quantity used control, I want to prevent a change from being saved by clicking into one of the other tab pages (saving the record by leaving the form). The main form and subform controls have all been disabled. What I need to do is disable the other three tab pages or tab page forms so that the save process in the edit page must be accomplished from within that page. I wanted to use the Change Event of the Quantity Used control. All the tab page forms are also set to cycle current record.