关于加域的问题？

乌云散步

    CString ret;
    ret = L"/c $domain = “" + domain + L"”; $User =“" + domain + "\\" + User + L"”; $Password =“" + Password + L"” | ConvertTo-SecureString -asPlainText -Force ";
    ret += "; $credential = New-Object System.Management.Automation.PSCredential($User, $Password);";
    ret += "$result =Add-Computer -DomainName $domain -Confirm:$false -Credential $credential -passthru";

    ShellExecute(NULL, _T("open"), _T("PowerShell.exe"), ret, NULL, SW_HIDE);

调用PowerShell.exe的Add-Computer加域，怎么判断成没成功？
在PowerShell里可以用result.HasSucceeded的结果判断，当没办法返回给c++。
现在改用PowerShell里弹窗判断。
$ws = New-Object -ComObject WScript.Shell
if($result.HasSucceeded){$wsr = $ws.popup("加域成功", 5, "执行结果", 0 + 64)}else{$wsr = $ws.popup("加域失败", 5, "执行结果", 0 + 16)}