C-Sharp (C#) Group: Re: Image Searching

I made up this code, but it still isn't working. Can anyone
try to fix
it plase?

        private Point findBitmap(Bitmap lt, Bitmap big)
        {
            BitmapData ltData = lt.LockBits(new Rectangle(0,
0,
lt.Width, lt.Height),
                            ImageLockMode.ReadWrite,
lt.PixelFormat);
//Format24bppRgb
            BitmapData bgData = big.LockBits(new
Rectangle(0, 0,
big.Width, big.Height),
                            ImageLockMode.ReadWrite,
big.PixelFormat);
            System.IntPtr ltScan0 = ltData.Scan0;
            System.IntPtr bgScan0 = bgData.Scan0;
            int ltStride = ltData.Stride;
            int bgStride = bgData.Stride;
            int ltWidth = lt.Width * 3;
            int bgWidth = big.Width * 3;
            unsafe
            {
                byte* bgp = (byte*)(void*)bgScan0;
                byte* ltp = (byte*)(void*)ltScan0;
                bool good;
                for (int y = 0; y < big.Height -
lt.Height; y++)
                {
                    for (int x = 0; x < bgWidth -
ltWidth; x++)
                    {
                        good = true;
                        for (int yy = 0; yy < lt.Height
&& good; yy++)
                        {
                            for (int xx = 0; xx < ltWidth
&& good;
xx++)
                            {
                                if (ltp[yy * ltWidth + xx]
!= bgp[(y +
yy) * bgWidth + x + xx])
                                    good = false;
                            }
                        }
                        if (good)
                        {
                            big.UnlockBits(bgData);
                            lt.UnlockBits(ltData);
                            return new Point((x / 3), (y /
3));
                        }
                    }
                }
            }
            big.UnlockBits(bgData);
            lt.UnlockBits(ltData);
            return new Point();
        }