procedure PaintDockFrame(Canvas: TCanvas; Control: TControl; const ARect: TRect); virtual;
virtual void __fastcall PaintDockFrame(Vcl::Graphics::TCanvas* Canvas, TControl* Control, const System::Types::TRect &ARect);
Paints the elements of a docking zone that surround a docked control.
Canvas is the drawing surface on which to paint.
Control is the control that is docked in the zone being rendered.
ARect indicates the boundaries of the entire docking zone.
Note: Descendent classes can override this method to change the way a dock tree paints docking zones. The descendent class should only paint in the portions of ARect that are not occupied by Control.