BOOL IsAdmin()
{    
    HANDLE hAccessToken;    
    BYTE * InfoBuffer = new BYTE[1024];    
    PTOKEN_GROUPS ptgGroups;    
    DWORD dwInfoBufferSize;    
    PSID psidAdministrators;    
    SID_IDENTIFIER_AUTHORITY siaNtAuthority = SECURITY_NT_AUTHORITY;    

    if(!OpenProcessToken(GetCurrentProcess(),TOKEN_QUERY,&hAccessToken))    
    {    
        delete InfoBuffer;    
        return FALSE;    
    }    

    if(!GetTokenInformation(hAccessToken,TokenGroups,InfoBuffer,1024,&dwInfoBufferSize))    
    {    
        delete InfoBuffer;    
        CloseHandle(hAccessToken);    
        return FALSE;    
    }    

    CloseHandle(hAccessToken);    

    if(!AllocateAndInitializeSid(&siaNtAuthority,    
        2,    
        SECURITY_BUILTIN_DOMAIN_RID,    
        DOMAIN_ALIAS_RID_ADMINS,    
        0,0,0,0,0,0,    
        &psidAdministrators))    
    {    
        delete InfoBuffer;    
        return FALSE;    
    }    

    ptgGroups = (PTOKEN_GROUPS)InfoBuffer;    

    for(UINT i = 0; i < ptgGroups->GroupCount; i++)    
    {    
        if(EqualSid(psidAdministrators,ptgGroups->Groups[i].Sid))    
        {    
            FreeSid(psidAdministrators);    
            delete InfoBuffer;    
            return TRUE;    
        }    
    }    
    return FALSE;    
}