_GUID

Metadatacopy
struct _GUID {
    unsigned long Data1;/* 0x0  4 */
    unsigned short Data2;/* 0x4  2 */
    unsigned short Data3;/* 0x6  2 */
    unsigned char Data4[8];/* 0x8  8 */
};
/* source: Windows 2000 RC2 DDK Alpha libcntpr.lib CodeView type records; build 2128 per the DDK's ntverp.h */