C++生成GUID

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

//--生成GUID
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;
}

int main(int argc, char* argv[])
{
//--COM
CoInitialize(NULL);

printf(newGUID());
printf("/r/n");

//--COM
CoUninitialize();

return 0;
}