_MESSAGE_RESOURCE_BLOCK

headersMetadatacopy
struct _MESSAGE_RESOURCE_BLOCK {
    unsigned long LowId;/* 0x0  4 */
    unsigned long HighId;/* 0x4  4 */
    unsigned long OffsetToEntries;/* 0x8  4 */
};
/* computed from WINNT.H, NT 4.0 SDK */