Анналог AutoreDraw(vb6) в С++ Builder есть?

int Line::firstPointPosition(int x, int y)
{
        x1 = x;
        y1 = y;
        frm1->Canvas->MoveTo(x,y);
}

int Line::lastPointPosition(int x, int y)
{
        x2 = x;
        y2 = x;
        frm1->Canvas->LineTo(x,y);
}
void __fastcall Tfrm1::MouseDown(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{
        line.firstPointPosition(0, 0);
        line.lastPointPosition(X, Y);
}
//---------------------------------------------------------------------------
void __fastcall Tfrm1::MouseMove(TObject *Sender, TShiftState Shift,
      int X, int Y)
{
        line.firstPointPosition(0, 0);
        line.lastPointPosition(X, Y);
}
//---------------------------------------------------------------------------