我是初学者，请问下列函数的作用，谢谢!

#pragma code ("UseAdmin.DLL")
#include "pwrt_api.h"
#pragma code ()
#define NO_MESSAGEBOX 1
CMN_ERROR err;
DWORD pwlevel = 0;
pwlevel = (DWORD) GetPasswordLevel(lpszPictureName,lpszObjectName);
if (pwlevel==0)
return(TRUE);
else
return(PWRTCheckPermissionOnPicture(pwlevel,lpszPictureName,NO_MESSAGEBOX,&err));