检测应用程序是否具有管理员权限

// isadmin.cpp (Windows NT/2000)

// This example will show how you can know if the current process

// has administrative privileges.

#include <windows.h>

#include <stdio.h>





BOOL IsAdmin(void);



void main(int argc, char* argv[])

{

   if (IsAdmin())

       printf("IsAdmin - TRUE");

   else

       printf("IsAdmin - FALSE");

}





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;

}