I have a form with a mainform and a subform. When the user is in the textbox, which is the closest to the subform, and the user press Tab, it has to jump into the subform, but it doesn't. It jumps to the textbox AFTER the subform. When the user is in the last textbox of the mainform and te user press tab, then it jumps into the subform.
How do I make sure, that the user will jump to the subform when he is in the textbox, which is the closest one to the subform?
Example image: