You can't I'm afraid. It is determined by the order that you place the controls on the form. The tab order in B4PPC seems to be the reverse of the "place" order.
You're right as usual dzt! I assumed that it only controlled the Z-order (which it does) like Visual Studio, I didn't realize that it also set the tab order:sign0161:
If usefull one can also use the "value_changed" events of the control to "jump" to another control after the user presses Enter to validade the imput, using: