Show-BaloonTip.ps1

#Usage: Show-BallonTip "Title" "Message"

function Show-BalloonTip
{
    [CmdletBinding()]
    param (
        [Parameter(Mandatory, Position = 0)]
        [string] $Title,

        [Parameter(Mandatory, Position = 1)]
        [ValidateNotNullOrEmpty()]
        [string] $Text,
	
        [Parameter(Position = 2)]
        [ValidateSet("Error", "Info", "None", "Warning")]
        [string] $IconType = 'Info',
	
        [Parameter(Position = 3)]
        [int] $Timeout = 10000 #Min: 10sec / Max:30sec
    )

    Add-Type -AssemblyName "System.Windows.Forms"

    if (!(Test-Path -Path Variable:\script:icon))
    {
        #Extract icon from powershell.exe
        $psExe = Join-Path $PSHOME "powershell.exe" -Resolve
        $script:icon = [Drawing.Icon]::ExtractAssociatedIcon($psExe)
    }
 
    $baloonTip = New-Object Windows.Forms.NotifyIcon -Property @{
        BalloonTipIcon = [Windows.Forms.ToolTipIcon] $IconType
        BalloonTipText = $Text
        BalloonTipTitle = $Title
        Icon = $script:icon
        Text = $Text[0..31] #Displayed when MouseOver at taskbar icon
        Visible = $true
    }

    $baloonTip.ShowBalloonTip($Timeout)

    #TODO:add_BalloonTipClosed event handler can't use in this context?
    Register-ObjectEvent $baloonTip -EventName BalloonTipClosed -Action {
        Unregister-Event $EventSubscriber.SourceIdentifier
        Remove-Job $EventSubscriber.Action
        $Sender.Dispose() #Need to dispose notify icon
    } | Out-Null
}