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POProperly displaying a tray balloon tooltip in PowerShell
 

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  1. POProperly displaying a tray balloon tooltip in PowerShell
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    <p><strong>Short version</strong>: I think I need help with properly using events in PowerShell that are invoked as a result of a Windows Message to get rid of a balloon tooltip's icon.</p> <p><strong>Long Version</strong>:</p> <p>I have a long-running PowerShell command (a build) that I would like to be notified when it completes via a balloon tooltip in the system tray/notification area.</p> <p>I was able to create a Write-BalloonTip script (below) that does roughly what I want. The only problem is that, <a href="https://stackoverflow.com/questions/1067844/issue-with-notifyicon-not-dissappearing-on-winforms-app">as sometimes happens with tray icons</a>, the tray icon doesn't disappear until I mouse over it. By re-using the same global variable to represent the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.notifyicon.aspx" rel="nofollow noreferrer">NotifyIcon</a>, I'm able to re-use this script and keep it so that only one system tray icon remains (until I mouse over it). This still feels like a hack. I tried to add an event handler so that it'd be notified on the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.notifyicon.balloontipclosed.aspx" rel="nofollow noreferrer">BalloonTipClosed</a> event and then dispose of it there. In the event handler, I tried all three techniques I've seen suggested for getting rid of the lingering icon to no avail. </p> <p>The annoying part is that a simple <code>.Dispose</code> seems to work on subsequent calls of the script, leading me to think that the event script block isn't being called at all.</p> <p>I've verified that BalloonTipClosed gets called after the tip fades away in a separate WinForms app.</p> <p>Am I missing something basic? Any help is much appreciated. Thanks!</p> <p>Here's the code for "Write-BalloonTip.ps1":</p> <pre><code>param ( $text, $title = "", $icon = "Info", $timeout=15000 ) [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | out-null [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") | out-null if ($global:writeBalloonTipIcon) { # This gets rid of the previous one $global:writeBalloonTipIcon.Dispose() } $global:writeBalloonTipIcon = new-object System.Windows.Forms.NotifyIcon $global:writeBalloonTipIcon.Icon = [System.Drawing.SystemIcons]::Information # FIXME: This *should* cleanup the icon after it's done, but it doesn't seem to work $global:writeBalloonTipIcon.add_BalloonTipClosed( { # this *should* work, but it's not. What am I missing? $global:writeBalloonTipIcon.Icon = $null; $global:writeBalloonTipIcon.Visible = $false; $global:writeBalloonTipIcon.Dispose(); }); $global:writeBalloonTipIcon.Visible = $true; $global:writeBalloonTipIcon.ShowBalloonTip($timeout, $title, $text, $icon); </code></pre>
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    1. USJeff Moser
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    1. COMaybe a little bit offtopic, but I found very useful Growl for Windows. Jaykul wrote a library that wraps the functionality. There is also a plugin that notifies you when your build/rebuild finishes. You may find it here: http://huddledmasses.org/more-growl-for-windows-from-powershell/ (I don't know if it is the latest version)
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    2. COHave you solved it?
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    3. CONot really, there wasn't a quick fix, so we just keep recycling a single global icon. It's a reasonable workaround until we get motivated to actually fix it by handling the STA issue.
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      1. USJeff Moser
 

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