实例：VC++生成GUID的代码

//--生成GUID的代码
//--相关程序/微软guidgen.exe


# include "stdafx.h"
# include < objbase. h>
# include < stdio. h>

const char * newGUID( )
{
    static char buf[ 64] = { 0} ;
    GUID guid;
    CoInitialize( NULL ) ;
    if ( S_OK = = : : CoCreateGuid( & guid) )
    {
        _snprintf( buf, sizeof ( buf) ,
            "{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}" ,
            guid. Data1,
            guid. Data2,
            guid. Data3,
            guid. Data4[ 0] , guid. Data4[ 1] ,
            guid. Data4[ 2] , guid. Data4[ 3] ,
            guid. Data4[ 4] , guid. Data4[ 5] ,
            guid. Data4[ 6] , guid. Data4[ 7] ) ;
    }
    CoUninitialize( ) ;
    return ( const char * ) buf;
}