VC如何判斷當前進程處在Administrator許可權下

#include
<
windows.h
>

#include
<
stdio.h
>

BOOL IsAdmin(
void
);

int
 main(
int
argc,
char
*
argv[])
{
  
if
(IsAdmin())
       printf(
"
IsAdmin - TRUE
"
);
  
else

       printf(
"
IsAdmin - FALSE
"
);

   return
0;
}

BOOL IsAdmin(
void
)
{
    HANDLE                   hAccessToken;
    BYTE                    
*
InfoBuffer;
    PTOKEN_GROUPS            ptgGroups;
    DWORD                    dwInfoBufferSize;
    PSID                     psidAdministrators;
    SID_IDENTIFIER_AUTHORITY siaNtAuthority
=
SECURITY_NT_AUTHORITY;
    UINT                     i;
    BOOL                     bRet
=
FALSE;

   
if
(
!
OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,
&
hAccessToken))
      
goto
cleanup;
   
    InfoBuffer
=

new
BYTE[
1024
];
   
if
(
!
InfoBuffer)
      
goto
cleanup;

    bRet
=
GetTokenInformation(hAccessToken,
                               TokenGroups,
                               InfoBuffer,
                              
1024
,
                              
&
dwInfoBufferSize);

    CloseHandle( hAccessToken );

   
if
(
!
bRet)
      
goto
cleanup;

   
if
(
!
AllocateAndInitializeSid(
&
siaNtAuthority,
                                
2
,
                                 SECURITY_BUILTIN_DOMAIN_RID,
                                 DOMAIN_ALIAS_RID_ADMINS,
                                
0
,
0
,
0
,
0
,
0
,
0
,
                                
&
psidAdministrators))
      
goto
cleanup;

    bRet
=
FALSE;

    ptgGroups
=
(PTOKEN_GROUPS)InfoBuffer;

   
for
(i
=
0
;i
<
ptgGroups
->
GroupCount;i
++
)
    {
       
if
(EqualSid(psidAdministrators,ptgGroups
->
Groups[i].Sid))
        {
            bRet
=
TRUE;
           
break
;
        }
    }

    FreeSid(psidAdministrators);

cleanup:

   
if
(InfoBuffer)
        delete InfoBuffer;

   
return
bRet;
}