GUID  6RYXQV

typedef struct _GUID { 

    unsigned long Data1;

    unsigned short Data2;

    unsigned short Data3;

    unsigned char Data4[8];

} GUID;

typedef GUID UUID;

Data1

Specifies the first eight hexadecimal digits of the UUID.

Data2

Specifies the first group of four hexadecimal digits of the UUID.

Data3

Specifies the second group of four hexadecimal digits of the UUID.

Data4

Specifies an array of eight elements that contains the third and final group of eight hexadecimal digits of the UUID in elements 0 and 1, and the final 12 hexadecimal digits of the UUID in elements 2 through 7.

Remarks

GUIDs are globally unique identifiers and are a Microsoft implementation of the DCE UUID.

UUIDs uniquely identify objects, such as interfaces, manager entry-point vectors, and client objects. The RPC run-time libraries use UUIDs to check for compatibility between clients and servers and to select among multiple implementations of an interface.

See Also