Fix description of MessageData parameter (#11663)

Author: sdwheeler

reference/5.1/Microsoft.PowerShell.Utility/Register-EngineEvent.md

@@ -2,7 +2,7 @@
 external help file: Microsoft.PowerShell.Commands.Utility.dll-Help.xml
 Locale: en-US
 Module Name: Microsoft.PowerShell.Utility
-ms.date: 12/12/2022
+ms.date: 01/13/2025
 online version: https://learn.microsoft.com/powershell/module/microsoft.powershell.utility/register-engineevent?view=powershell-5.1&WT.mc_id=ps-gethelp
 schema: 2.0.0
 title: Register-EngineEvent
@@ -16,8 +16,9 @@ Subscribes to events that are generated by the PowerShell engine and by the `New
 ## SYNTAX
 
 ```
-Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>] [-MessageData <PSObject>]
- [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>] [<CommonParameters>]
+Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>]
+ [-MessageData <PSObject>] [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>]
+ [<CommonParameters>]
 ```
 
 ## DESCRIPTION
@@ -80,15 +81,19 @@ data to a text file.
 
 ```powershell
 Register-EngineEvent -SourceIdentifier MyEventSource -Action {
-    "Event: {0}" -f $event.messagedata | Out-File c:\temp\MyEvents.txt -Append
+    "Event: {0}" -f $event.MessageData | Out-File c:\temp\MyEvents.txt -Append
 }
 
 Start-Job -Name TestJob -ScriptBlock {
     While ($True) {
         Register-EngineEvent -SourceIdentifier MyEventSource -Forward
         Start-Sleep -seconds 2
         "Doing some work..."
-        New-Event -SourceIdentifier MyEventSource -Message ("{0} -  Work done..." -f (Get-Date))
+        $newEventSplat = @{
+            SourceIdentifier = 'MyEventSource'
+            MessageData      = ("{0} -  Work done..." -f (Get-Date))
+        }
+        New-Event @newEventSplat
     }
 }
 Start-Sleep -seconds 4
@@ -209,8 +214,8 @@ Accept wildcard characters: False
 
 ### -MessageData
 
-Specifies additional data associated with the event. The value of this parameter appears in the
-**MessageData** property of the event object.
+This parameter is part of the base class for all Event cmdlets. The `Register-EngineEvent` doesn't
+use this parameter. Any data passed to this parameter is ignored.
 
 ```yaml
 Type: System.Management.Automation.PSObject

reference/7.4/Microsoft.PowerShell.Utility/Register-EngineEvent.md

@@ -2,7 +2,7 @@
 external help file: Microsoft.PowerShell.Commands.Utility.dll-Help.xml
 Locale: en-US
 Module Name: Microsoft.PowerShell.Utility
-ms.date: 12/12/2022
+ms.date: 01/13/2025
 online version: https://learn.microsoft.com/powershell/module/microsoft.powershell.utility/register-engineevent?view=powershell-7.4&WT.mc_id=ps-gethelp
 schema: 2.0.0
 title: Register-EngineEvent
@@ -16,8 +16,9 @@ Subscribes to events that are generated by the PowerShell engine and by the `New
 ## SYNTAX
 
 ```
-Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>] [-MessageData <PSObject>]
- [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>] [<CommonParameters>]
+Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>]
+ [-MessageData <PSObject>] [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>]
+ [<CommonParameters>]
 ```
 
 ## DESCRIPTION
@@ -80,15 +81,19 @@ data to a text file.
 
 ```powershell
 Register-EngineEvent -SourceIdentifier MyEventSource -Action {
-    "Event: {0}" -f $event.messagedata | Out-File c:\temp\MyEvents.txt -Append
+    "Event: {0}" -f $event.MessageData | Out-File c:\temp\MyEvents.txt -Append
 }
 
 Start-Job -Name TestJob -ScriptBlock {
     While ($True) {
         Register-EngineEvent -SourceIdentifier MyEventSource -Forward
         Start-Sleep -seconds 2
         "Doing some work..."
-        New-Event -SourceIdentifier MyEventSource -Message ("{0} -  Work done..." -f (Get-Date))
+        $newEventSplat = @{
+            SourceIdentifier = 'MyEventSource'
+            MessageData      = ("{0} -  Work done..." -f (Get-Date))
+        }
+        New-Event @newEventSplat
     }
 }
 Start-Sleep -seconds 4
@@ -209,8 +214,8 @@ Accept wildcard characters: False
 
 ### -MessageData
 
-Specifies additional data associated with the event. The value of this parameter appears in the
-**MessageData** property of the event object.
+This parameter is part of the base class for all Event cmdlets. The `Register-EngineEvent` doesn't
+use this parameter. Any data passed to this parameter is ignored.
 
 ```yaml
 Type: System.Management.Automation.PSObject

reference/7.5/Microsoft.PowerShell.Utility/Register-EngineEvent.md

@@ -2,7 +2,7 @@
 external help file: Microsoft.PowerShell.Commands.Utility.dll-Help.xml
 Locale: en-US
 Module Name: Microsoft.PowerShell.Utility
-ms.date: 12/12/2022
+ms.date: 01/13/2025
 online version: https://learn.microsoft.com/powershell/module/microsoft.powershell.utility/register-engineevent?view=powershell-7.5&WT.mc_id=ps-gethelp
 schema: 2.0.0
 title: Register-EngineEvent
@@ -16,8 +16,9 @@ Subscribes to events that are generated by the PowerShell engine and by the `New
 ## SYNTAX
 
 ```
-Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>] [-MessageData <PSObject>]
- [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>] [<CommonParameters>]
+Register-EngineEvent [-SourceIdentifier] <String> [[-Action] <ScriptBlock>]
+ [-MessageData <PSObject>] [-SupportEvent] [-Forward] [-MaxTriggerCount <Int32>]
+ [<CommonParameters>]
 ```
 
 ## DESCRIPTION
@@ -80,15 +81,19 @@ data to a text file.
 
 ```powershell
 Register-EngineEvent -SourceIdentifier MyEventSource -Action {
-    "Event: {0}" -f $event.messagedata | Out-File c:\temp\MyEvents.txt -Append
+    "Event: {0}" -f $event.MessageData | Out-File c:\temp\MyEvents.txt -Append
 }
 
 Start-Job -Name TestJob -ScriptBlock {
     While ($True) {
         Register-EngineEvent -SourceIdentifier MyEventSource -Forward
         Start-Sleep -seconds 2
         "Doing some work..."
-        New-Event -SourceIdentifier MyEventSource -Message ("{0} -  Work done..." -f (Get-Date))
+        $newEventSplat = @{
+            SourceIdentifier = 'MyEventSource'
+            MessageData      = ("{0} -  Work done..." -f (Get-Date))
+        }
+        New-Event @newEventSplat
     }
 }
 Start-Sleep -seconds 4
@@ -209,8 +214,8 @@ Accept wildcard characters: False
 
 ### -MessageData
 
-Specifies additional data associated with the event. The value of this parameter appears in the
-**MessageData** property of the event object.
+This parameter is part of the base class for all Event cmdlets. The `Register-EngineEvent` doesn't
+use this parameter. Any data passed to this parameter is ignored.
 
 ```yaml
 Type: System.Management.Automation.PSObject