foreach (OMath math in doc.Content.OMaths)
                {
                    math.Range.Select();
                    math.Range.CopyAsPicture();

                    System.Windows.Forms.IDataObject dobj = System.Windows.Forms.Clipboard.GetDataObject();

                    if( dobj.GetDataPresent(typeof(System.Drawing.Bitmap)) )
                    {
                        System.Drawing.Bitmap bitmap = (Bitmap)dobj.GetData(typeof(System.Drawing.Bitmap));
                        bitmap.Save("C:\tempFolder\Image" + cnt + ".bmp", ImageFormat.Bmp);
                    }

                    cnt++;

                }