procedure AdjustClientRect(var Rect: TRect); override;
virtual void __fastcall AdjustClientRect(System::Types::TRect &Rect);
Adjusts the ClientRect property to exclude the scroll bars.
AdjustClientRect is called internally when the control needs accurate information on where to place child controls within the client area. It indents Rect to exclude the area taken by the scroll bars, then calls the inherited AdjustClientRect method.