You want to create new events for other scripts to consume or want to respond automatically when they occur.

Use the New-Event cmdlet to generate a custom event. Use the -Action parameter of the Register-EngineEvent cmdlet to respond to that event automatically.

PS > Register-EngineEvent -SourceIdentifier Custom.Event `
    -Action { Write-Host "Received Event" }


PS > $null = New-Event Custom.Event
Received Event

The New-Event cmdlet lets you create new custom events for other scripts or event registrations to consume. When you call the New-Event cmdlet, PowerShell adds a new entry to the session-wide event repository called the event queue. You can use the Get-Event cmdlet to see events added to this queue, or you can use the Register-EngineEvent cmdlet to have PowerShell respond automatically.