C#

private const int WM_DWMCOMPOSITIONCHANGED = 0x031E;
private const int WM_DWMNCRENDERINGCHANGED = 0x031F;
private const int WM_DWMCOLORIZATIONCOLORCHANGED = 0x0320;
private const int WM_DWMWINDOWMAXIMIZEDCHANGE = 0x0321;

protected override void WndProc(ref Message msg)
{
    if (msg.Msg == WM_DWMWINDOWMAXIMIZEDCHANGE)
    {
        /* ... */
    }

    base.WndProc(ref msg);
}

<br />
public static byte[] check(Bitmap b)<br />
 {<br />
 BitmapData bmData<br />
          = b.LockBits(new Rectangle(0, 0, b.Width, b.Height), ImageLockMode.ReadOnly,PixelFormat.Format24bppRgb);<br />
            int stride = bmData.Stride;<br />
            byte[] bytes = new byte[stride * b.Height];<br />
            System.IntPtr Scan0 = bmData.Scan0;<br />
            unsafe<br />
            {<br />
                int a = 0;<br />
                byte* p = (byte*)(void*)Scan0;<br />
                int nOffset = stride - b.Width * 3;<br />
                int nWidth = b.Width * 3;<br />
                for (int y = 0; y < b.Height; ++y)<br />
                {<br />
                    for (int x = 0; x < nWidth; ++x)<br />
                    {<br />
<br />
                        bytes[a] = p[0];<br />
                        a++;<br />
  Here I got the error-> bytes[a] = p[1];<br />
                        a++;<br />
                        bytes[a] = p[2];<br />
                        a++;<br />
                        p += 3;<br />
<br />
                    }<br />
                   p += nOffset;<br />
                }<br />
            }<br />
            b.UnlockBits(bmData);<br />
            return bytes;<br />
           }<br />
 <br />