How to change the tab order of the controls in axapta ?

There is the way, using code in the init
 (or calling a method which handles the tabOrder from init).

void init()
{
    Array tabOrder = new Array(Types::Integer);
    ;
    super();

    tabOrder.value(1, Control1.id());
    tabOrder.value(2, Control2.id());
    tabOrder.value(3, Control3.id());...etc

    element.tabOrder(tabOrder);
}