uint SHGFI_ICON = 0x100;
[StructLayout( LayoutKind.Sequential )]
[MarshalAs( UnmanagedType.ByValTStr , SizeConst = 260 )]
[DllImport( "gdi32.dll" )]
        private static extern IntPtr CreateDIBSection( IntPtr hdc , [In , _
          MarshalAs( UnmanagedType.LPStruct )]BITMAPINFO pbmi , uint iUsage , _
          out IntPtr ppvBits , IntPtr hSection , uint dwOffset );