private void Init()
{
                IImagingFactory factory = (IImagingFactory)Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid("327ABDA8-072B-11D3-9D7B-0000F81EF32E")));

                factory.CreateImageFromFile(filePath, out imagingImage);
                backBuffer = new Bitmap(this.ClientSize.Width, this.ClientSize.Height, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
}