C++生成GUID

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

 //--生成GUID
 const char* newGUID()
 {
     static char buf[] = {};
     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[], guid.Data4[]
         , guid.Data4[], guid.Data4[], guid.Data4[], guid.Data4[]
         , guid.Data4[], guid.Data4[]
         );
     }
     return (const char*)buf;
 }

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

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

     //--COM
     CoUninitialize();

     return ;
 }