C#

<br />
IntPtr hWindowDC = IntPtr.Zero;<br />
<br />
public class User<br />
{<br />
     [DllImport("user32.dll")]<br />
     public static extern IntPtr GetDC(IntPtr hWnd);<br />
<br />
     [DllImport("user32.dll")]<br />
     public static extern void ReleaseDC(IntPtr hWnd, IntPtr hDC);<br />
}<br />
<br />
public class Gdi<br />
{<br />
     [DllImport("gdi32.dll")]<br />
     public static extern IntPtr SelectPalette(IntPtr hDC, IntPtr hPalette, bool bForceBackground);<br />
<br />
     [DllImport("gdi32.dll")]<br />
     public static extern int RealizePalette(IntPtr hDC);<br />
<br />
     [DllImport("gdi32.dll")]<br />
     public static extern int GetDeviceCaps(IntPtr hDC, int nIndex);<br />
<br />
     [DllImport("gdi32.dll")]<br />
     public static extern IntPtr CreatePalette([In] IntPtr lpLogPalette);<br />
<br />
     public const int PC_RESERVED = 0x01;     // palette index used for animation<br />
     public const int PC_EXPLICIT = 0x02;     // palette index is explicit to device<br />
     public const int PC_NOCOLLAPSE = 0x04;     // do not match color to system palette<br />
}<br />
<br />
[StructLayout(LayoutKind.Sequential)]<br />
public struct LOGPALETTE<br />
{<br />
     public ushort palVersion;<br />
     public ushort palNumEntries;<br />
     public PALETTEENTRY palPalEntry;<br />
<br />
     public LOGPALETTE(ushort entries)<br />
     {<br />
          this.palVersion = 0x300;<br />
          this.palNumEntries = entries;<br />
          this.palPalEntry = new PALETTEENTRY(0,0,0,0);<br />
     }<br />
          <br />
     public int Length<br />
     {<br />
          get<br />
          {<br />
               return Marshal.SizeOf(palVersion) + Marshal.SizeOf(palNumEntries) + (this.palNumEntries * 4);<br />
          }<br />
     }<br />
}<br />
<br />
[StructLayout(LayoutKind.Sequential)]<br />
public struct PALETTEENTRY<br />
{<br />
     public byte peRed;<br />
     public byte peGreen;<br />
     public byte peBlue;<br />
     public byte peFlags;<br />
<br />
     public PALETTEENTRY(byte red, byte green, byte blue, byte flags)<br />
     {<br />
          this.peRed = red;<br />
          this.peGreen = green;<br />
          this.peBlue = blue;<br />
          this.peFlags = flags;<br />
     }<br />
<br />
     public override string ToString()<br />
     {<br />
          return string.Format("{0} {1} {2}", Convert.ToString(peRed, 10), Convert.ToString(peGreen, 10), Convert.ToString(peBlue, 10));<br />
     }<br />
<br />
}<br />
<br />
<br />
private static void LoadImagePalette()<br />
{<br />
     Assembly exeAssembly = Assembly.GetExecutingAssembly();<br />
<br />
     Stream imgStream = null;<br />
<br />
     imgStream = exeAssembly.GetManifestResourceStream("MyPalette.image256.bmp");<br />
     if( !(null==imgStream) )<br />
     {<br />
          Image image = Bitmap.FromStream( imgStream );// as Bitmap;<br />
          LOGPALETTE logPal = new LOGPALETTE((ushort)(image.Palette.Entries.Length));<br />
<br />
          byte []paletteBytes = new byte[image.Palette.Entries.Length*4];<br />
<br />
          for (int i=0; i < image.Palette.Entries.Length; i++)<br />
          {<br />
               paletteBytes[(i*4)] = image.Palette.Entries[i].R; // red<br />
               paletteBytes[(i*4)+1] = image.Palette.Entries[i].G; // green<br />
               paletteBytes[(i*4)+2] = image.Palette.Entries[i].B; // blue<br />
               paletteBytes[(i*4)+3] = 0; // flags<br />
          }<br />
<br />
          IntPtr ptrPal = Marshal.AllocHGlobal(logPal.Length);<br />
          Marshal.StructureToPtr(logPal, ptrPal, true);<br />
<br />
          IntPtr palPalEntryAddress = new IntPtr(ptrPal.ToInt32() + Marshal.SizeOf(logPal.palVersion) + Marshal.SizeOf(logPal.palNumEntries) );<br />
          Marshal.Copy(paletteBytes, 0, palPalEntryAddress, paletteBytes.Length);<br />
                    <br />
          IntPtr hPalette = Gdi.CreatePalette(ptrPal);<br />
<br />
          Gdi.SelectPalette(hWindowDC, hPalette, false);//false);<br />
          Gdi.RealizePalette(hWindowDC);<br />
<br />
          Graphics newGraphics = Graphics.FromHdc(hWindowDC);<br />
          newGraphics.DrawImage(image, 0, 0);<br />
<br />
          if (ptrPal != IntPtr.Zero)<br />
               Marshal.FreeHGlobal(ptrPal);<br />
                    <br />
          imgStream.Close();<br />
<br />
     }<br />
}<br />