You can change Pen and Brush property in inspector (see it in Editor demo),but also you can do it by code.
Code example:
procedure TMainFrm.Button1Click(Sender: TObject); var mMyShape:TMyShape; begin mMyShape:=MyCAD1.GetSelectedShape; IF mMyShape <> nil then begin mMyShape.Pen.Color:=clRed; mMyShape.Brush.Color:=clGreen; mMyShape.Brush.Style:=bsSolid; end; end;