Toolbar Icons for PowerShell WPF GUI - Updated Jan 7 to support keyboard interaction.

Show-WPFIconExample.ps1

# THIS CODE CANNOT BE COPY/PASTED INTO THE CONSOLE. PLEASE SAVE IT AS A FILE AND EXECUTE.
 
# Add required assemblies
Add-Type -AssemblyName PresentationFramework, System.Drawing, System.Windows.Forms, WindowsFormsIntegration
 
# Setup the XAML
[xml]$script:xaml = '<Window 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        Title="Acadiana (Cajun) Flag" Height="240" Width="320" Background="Gray">
 <Window.TaskbarItemInfo>
         <TaskbarItemInfo/>
 </Window.TaskbarItemInfo>
    <Grid>
        <Image Name="image" Height="64" Width="64"/>
    </Grid>
</Window>'
 
# Create the form and set variables
$script:window = [Windows.Markup.XamlReader]::Load((New-Object System.Xml.XmlNodeReader $xaml))
$xaml.SelectNodes("//*[@Name]") | ForEach-Object { Set-Variable -Name ($_.Name) -Value $window.FindName($_.Name) -Scope Script }
 
# here's the base64 string of the image
$base64 = "iVBORw0KGgoAAAANSUhEUgAAAEAAAAAuCAIAAAAX9YijAAAABmJLR0QA/wD/AP+gvaeTAAAGCElEQVRogc1Za0xTZxh+TukVWlrB6rjUzrmqM855Q0CGCB
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# Create a streaming image by streaming the base64 string to a bitmap streamsource
$bitmap = New-Object System.Windows.Media.Imaging.BitmapImage
$bitmap.BeginInit()
$bitmap.StreamSource = [System.IO.MemoryStream][System.Convert]::FromBase64String($base64)
$bitmap.EndInit()
$bitmap.Freeze()
 
# This is the pic in the middle
$image.source = $bitmap
 
# This is the icon in the upper left hand corner of the app
$window.Icon = $bitmap
 
# This is the toolbar icon and description
$window.TaskbarItemInfo.Overlay = $bitmap
$window.TaskbarItemInfo.Description = $window.Title
 
# Add Exit (Thanks, Ryan!)
$window.Add_Closing({[System.Windows.Forms.Application]::Exit(); Stop-Process $pid})
 
# Make PowerShell Disappear 
$windowcode = '[DllImport("user32.dll")] public static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);' 
$asyncwindow = Add-Type -MemberDefinition $windowcode -name Win32ShowWindowAsync -namespace Win32Functions -PassThru 
$null = $asyncwindow::ShowWindowAsync((Get-Process -PID $pid).MainWindowHandle, 0) 
 
# Allow input to window for TextBoxes, etc
[System.Windows.Forms.Integration.ElementHost]::EnableModelessKeyboardInterop($window)
 
# Running this without $appContext and ::Run would actually cause a really poor response.
$window.Show()
 
# This makes it pop up
$window.Activate()
 
# Create an application context for it to all run within. 
# This helps with responsiveness and threading.
$appContext = New-Object System.Windows.Forms.ApplicationContext 
[void][System.Windows.Forms.Application]::Run($appContext)