#include <windows.h>
#include <stdio.h>
 
 
/*
 *
 *
 */
int main()
{
  int lRetVal = 0;
  SID_IDENTIFIER_AUTHORITY lNtAuthority = SECURITY_NT_AUTHORITY;
  PSID lAdmGroup = NULL;
  BOOL lIsAdmin = FALSE;
 
 
  if(AllocateAndInitializeSid(&lNtAuthority, 2, SECURITY_BUILTIN_DOMAIN_RID,
    DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, &lAdmGroup)) 
  {
    if (!CheckTokenMembership(NULL, lAdmGroup, &lIsAdmin))
         lIsAdmin = FALSE;
    FreeSid(lAdmGroup); 
  }
 
 
  if (lIsAdmin)
    printf("Is administrator\n");
  else
    printf("Is not administrator\n");
 
 
  return(lRetVal);
}