anchor.diff:  {----------------THtmlViewer.HTMLMouseWheel}
   
   procedure THtmlViewer.HTMLMouseWheel(Sender: TObject; Shift: TShiftState;
  -  WheelDelta: Integer; MousePos: TPoint);
  +  WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
   var
     Lines: Integer;
   begin
  
positive.code:   PaintPanel.OnMouseDown := HTMLMouseDown;
    PaintPanel.OnMouseMove := HTMLMouseMove;
    PaintPanel.OnMouseUp := HTMLMouseUp;
  
    VScrollBar := TScrollBar.Create(Self);
    VScrollBar.Kind := sbVertical;
  
negative.code:     procedure HTMLMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer); virtual;
      procedure HTMLMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer); virtual;
      procedure HTMLMouseUp(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer); virtual;
      procedure HTMLMouseWheel(Sender: TObject; Shift: TShiftState; WheelDelta: Integer; MousePos: TPoint; var Handled: Boolean);
      procedure HTMLPaint(ACanvas: TCanvas; const ARect: TRect);
      procedure InitLoad; virtual;
      procedure LoadDocument(Document: TBuffer; const DocName: ThtString; DocType: THtmlFileType);
  