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procedure TMainDia.PlanShapeMouseDown(Sender: TObject;
  Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
begin
 //if Draw then
  //begin
  Canvas.MoveTo(X,Y);
 // end;
end;

procedure TMainDia.PlanShapeMouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
 //if Draw then
 // begin
   Canvas.LineTo(X,Y);
 // end;
end;