Third question - Using parameters in powershell recovery - Alert description

Question

Hi guys,
With help i created powershell recovery in a management pack. Once again thanks very much, this is new to me. Now i know these parameters (variables):
http://blogs.technet.com/b/kevinholman/archive/2009/09/23/alert-notification-subscription-variables-and-linking-that-to-the-console-database-and-sdk.aspx
But how can i implement this in this XML? I think i must declare them in the XML, because when i put the variable there, it doesn't work. I would like to get the alert description in the message variable (see xml below)
</Recovery>
<Recovery ID="MomUIGenaratedRecovery28e1547022254ccbb82784c60d51b1d2" Accessibility="Public" Enabled="true" Target="Type603f92b7b83945598af55495615db953" Monitor="UIGeneratedMonitor0cd347f57f3949deb958cebb02d25555" ResetMonitor="false" ExecuteOnState="Error" Remotable="true" Timeout="300">
<Category>Custom</Category>
<WriteAction ID="MomUIGenaratedModule75df98fbfc5b48e39fd605cccd97d29b" TypeID="Windows!Microsoft.Windows.PowerShellWriteAction">
<ScriptName>sendSMS.ps1</ScriptName>
<ScriptBody>
# function SendSMS
# PowerShell function to send SMS messages via the CM SMS Gateway.
function SendSMS{
param([string]$url, [int]$customer, [string]$login, [string]$password, [string]$recipient, [string]$sender,[string]$reference)
$xml = New-Object XML
$messages = $xml.CreateElement("MESSAGES")
$customerxml = $xml.CreateElement("CUSTOMER")
$customerxml.SetAttribute("ID", $customer)
$messages.AppendChild($customerxml)|Out-Null
$user = $xml.CreateElement("USER")
$user.SetAttribute("LOGIN", $login)
$user.SetAttribute("PASSWORD", $password)
$messages.AppendChild($user) |Out-Null
if (!($reference.Equals(''))) {
$refxml = $xml.CreateElement("REFERENCE")
$refxml.Innertext = $reference
$messages.AppendChild($refxml) |Out-Null
$tariff = $xml.CreateElement("TARIFF")
$tariff.InnerText = 0
$messages.AppendChild($tariff) |Out-Null
$msg = $xml.CreateElement("MSG")
$from = $xml.CreateElement("FROM")
$from.InnerText = $sender
$msg.AppendChild($from) |Out-Null
$to = $xml.CreateElement("TO")
$to.InnerText = $recipient
$msg.AppendChild($to) |Out-Null
$body = $xml.CreateElement("BODY")
$body.SetAttribute("TYPE", "TEXT")
$body.InnerText = $message
$msg.AppendChild($body) |Out-Null
$messages.AppendChild($msg) |Out-Null
$xml.AppendChild($messages) |Out-Null
Write-Output $xml.OuterXml
$webClient = New-Object net.WebClient
return ($webClient.UploadString($url, $xml.OuterXml))
# test
SendSMS -url 'https://website.sms.nl/webservice.ashx' -recipient 0031612345678 -customer 1 -login 1 -password 'password' -sender 'Standby' -message 'Here i want the alert description' -reference '1234'
</ScriptBody>
<TimeoutSeconds>60</TimeoutSeconds>
</WriteAction>
Kind regards,
André

Answer 1

Parameters are defined between ScriptBody and TimeoutSeconds like this:
<Parameters>
<Parameter>
<Name>param1</Name>
<Value>$Config/param1$</Value>
</Parameter>
<Parameter>
<Name>param2</Name>
<Value>$Config/param2$</Value>
</Parameter>
</Parameters
This information is available on MSDN.
Jonathan Almquist | SCOMskills, LLC (http://scomskills.com)