private void Read_DWG_Click(object sender, EventArgs e)
         {
             //DWGImage class is used only for reading DWG. To read other
 formatsuse the corresponding classes. 
             //E.g. for DXF: CADImage class, for PLT/HPGL: HPGLImage class.
             DWGImage vDrawing = new DWGImage();
             vDrawing.LoadFromFile(@"..\..\..\Files\Gasket.dwg");
             vDrawing.Draw(Image1.CreateGraphics(), new RectangleF(0, 0,
 (float)vDrawing.AbsWidth, (float)vDrawing.AbsHeight));
             // zooming and panning of the drawing are implemented in the demo
 Viewer
             // via a special viewing control class CADPictureBox
         }