C++的GUID的生成代码

const char* newGUID()
{
static char buf[64] = {0};
GUID guid;
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]
);
}
return (const char*)buf;
}