Dim GmBitmap As GraphicsMill.Bitmap
        GmBitmap = AxBitmapViewer1.Bitmap

        'Convert GmBitmap.Data.PixelFormat type into System.Drawing.Imaging.PixelFormat
        'Pixel format in Graphics Mill is superset of System.Drawing.Imaging.PixelFormat
        'We need to remove some bit flags from numeric value of current pixel format
        'using multiplying with &HBFFFFF
        Dim pf As System.Drawing.Imaging.PixelFormat = _
            System.Enum.Parse(GetType(Drawing.Imaging.PixelFormat), GmBitmap.Data.PixelFormat And &HBFFFFF)

        'Check if pixel format is supported by GDI+
        If Not System.Enum.IsDefined(GetType(Drawing.Imaging.PixelFormat), pf) Then
            GmBitmap.Data.ConvertTo32bppArgb(255, False)
            pf = Drawing.Imaging.PixelFormat.Format32bppArgb
        End If

        'Create System.Drawing.Bitmap on Graphics Mill Bitmap data without copying
        Dim GdiplusBitmap As New Bitmap(GmBitmap.Data.Width, GmBitmap.Data.Height, GmBitmap.Data.Stride, _
                pf, New IntPtr(GmBitmap.Data.Scan0))
        GdiplusBitmap.Save("c:\test3.jpg")

// bmpFloor is an .net bmp object


// create the new aurigma bitmap
Aurigma.GraphicsMill.BitmapClass gmFloor = new Aurigma.GraphicsMill.BitmapClass();

// copy the info
MemoryStream memStream = new MemoryStream();
bmpFloor.Save( memStream, System.Drawing.Imaging.ImageFormat.Jpeg );
gmFloor.LoadFromMemory(memStream.GetBuffer());

// dont need the floor ms-bmp anymore
bmpFloor.Dispose();

using System.Runtime.InteropServices;

[DllImport("kernel32.dll")]
static extern void CopyMemory(System.IntPtr pDest, System.IntPtr pSrc, long byteLength);

private GraphicsMill.IBitmap GdiplusBitmapToGmBitmap(System.Drawing.Bitmap gdiplusBitmap)
{
      // Convert GDI+ pixel format value to Graphics Mill pixel format
      GraphicsMill.PixelFormat pf;
      switch (gdiplusBitmap.PixelFormat)
      {
            case System.Drawing.Imaging.PixelFormat.Format24bppRgb:
                  pf = GraphicsMill.PixelFormat.Format24bppRgb;
                  break;
            case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
                  pf = GraphicsMill.PixelFormat.Format32bppArgb;
                  break;
            case System.Drawing.Imaging.PixelFormat.Format32bppRgb:
                  pf = GraphicsMill.PixelFormat.Format32bppRgb;
                  break;
            case System.Drawing.Imaging.PixelFormat.Format32bppPArgb:
                  pf = GraphicsMill.PixelFormat.Format32bppPArgb;
                  break;
            default:
                  throw new System.Exception("Incompatible pixel format");
      }
                  
      // Create new empty bitmap
      GraphicsMill.IBitmap gmBitmap = new GraphicsMill.BitmapClass();
      gmBitmap.CreateNew(gdiplusBitmap.Width, gdiplusBitmap.Height, pf, GraphicsMill.GraphicsMillConstants.ColorWhite, null);

      System.Drawing.Imaging.BitmapData bitmapData;
      System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, gdiplusBitmap.Width, gdiplusBitmap.Height);
      bitmapData = gdiplusBitmap.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadOnly, gdiplusBitmap.PixelFormat);

      CopyMemory(new IntPtr(gmBitmap.Data.Scan0), bitmapData.Scan0, bitmapData.Stride * bitmapData.Height);

      gdiplusBitmap.UnlockBits(bitmapData);

      return gmBitmap;
}
      
private void button1_Click(object sender, System.EventArgs e)
{
      System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(@"D:\[Test Files]\Pictures\Blue hills.bmp");
      GraphicsMill.IBitmap gmBitmap = GdiplusBitmapToGmBitmap(bmp);
      gmBitmap.SaveToFile(@"d:\csharp.jpg");
}