void __fastcall BringToFront();
Puts the control in front of all other controls in its parent control.
Call BringToFront to ensure that a form is visible or to reorder overlapping controls within a form.
Note that controls that wrap Windows screen objects (control classes descended from TWinControl) always "stack" above lightweight controls (control classes descended from TGraphicControl). BringToFront can force a lightweight control, such as a Shape, to stack above other lightweight controls, but wrapped controls, such as an Edit, will still stack above the Shape.
Without BringToFront, controls are stacked in the order they were placed on the form.