This structure is a generic palette and it defines a color palette of up to 256 entries. This structure is used as part of the CODECVIDEOHEADER structure.
typedef struct _GENPAL {
ULONG ulStartIndex; /* Starting RGB index. */
ULONG ulNumColors; /* Number of following entries. */
PRGB2 prgb2Entries; /* 256 RGB entries. */
} GENPAL;
typedef GENPAL * PGENPAL ;