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    public static Bitmap GetImage(string source)
        {
            int imgName;
            Il.ilInit();
            Ilu.iluInit();
            Il.ilGenImages(1, out imgName);

            Il.ilBindImage(imgName);
            Il.ilLoadImage(source);
            int width = Il.ilGetInteger(Il.IL_IMAGE_WIDTH);
            int height = Il.ilGetInteger(Il.IL_IMAGE_HEIGHT);
            int bpp = Il.ilGetInteger(Il.IL_IMAGE_BPP);

            var ptr = Il.ilGetData();
            //int numBytes = width * height * 4;
            //byte[] rgbValues = new byte[numBytes];

            //Marshal.Copy(ptr, rgbValues, 0, numBytes);

            Bitmap bmp = new Bitmap(width, height, width * 4, PixelFormat.Format32bppArgb, ptr);
            BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadWrite, bmp.PixelFormat);
            Bitmap newBitmap = new Bitmap(width,height, bmpData.Stride, PixelFormat.Format32bppArgb, bmpData.Scan0);

            bmp.UnlockBits(bmpData);
            bmp.Dispose();
            Il.ilDeleteImages(1, ref imgName);

            return newBitmap;
        }


Control.BackgroundImage = ...					

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Bitmap bmp = new Bitmap(width, height);
BitmapData bmd = bmp.LockBits(rect, ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);

Il.ilCopyPixels(0, 0, 0, Il.ilGetInteger(Il.IL_IMAGE_WIDTH), Il.ilGetInteger(Il.IL_IMAGE_HEIGHT),1, Il.IL_BGRA, Il.IL_UNSIGNED_BYTE, bmd.Scan0);