When you place controls in a window, PocketBuilder assigns them a default tab order, the default sequence in which focus moves from control to control when the user presses the Tab key. Although it is not standard practice to use the Tab key for changing focus in Windows CE applications, you have this capability with applications that you develop for Pocket PC devices in PocketBuilder.
Tab order in user objects When the user tabs to a custom user object in a window and then presses the Tab key (or up/down arrow keys in a Smartphone application), focus moves to the next control in the tab order for the user object. After the user tabs to all the controls in the tab order for the user object, focus moves to the next control in the window tab order.