internal static extern GFL_ERROR gflLoadBitmapFromMemory( IntPtr data, UInt32 data_length, out IntPtr bitmap, ref GFL_LOAD_PARAMS parameters, IntPtr informations );
internal static extern GFL_ERROR gflLoadBitmap(string filename, out IntPtr bitmap, ref GFL_LOAD_PARAMS param, out GFL_FILE_INFORMATION informations);
internal static extern GFL_ERROR gflLoadBitmapFromHandle(IntPtr handle, out IntPtr bitmap, ref GFL_LOAD_PARAMS parameters, IntPtr informations);
internal static extern GFL_ERROR gflLoadBitmap(string filename, [Out] out IntPtr bitmap, ref GFL_LOAD_PARAMS param, IntPtr informations);