A simple PowerShell GUI clickable form with four buttons

powershellgui.ps1

# it is oddly difficult to find good, easy examples of creating PowerShell GUI forms with non-standard buttons
# this is a simple example that displays a four-button form
# you can, of course, customize everything in the <grid>
# and will need to set the window width and height to match the number of buttons and font
# use and adapt freely, subject to unlicense https://choosealicense.com/licenses/unlicense/
[void][System.Reflection.Assembly]::LoadWithPartialName('presentationframework')
[xml]$XAML = @'
<Window
  xmlns =
    "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x  = "http://schemas.microsoft.com/winfx/2006/xaml"
    Name          = "simpleform"
    Title         = "A Simple Form With Four Selectable Buttons"
    WindowStartupLocation = "CenterScreen"
    Width         = "200"
    Height        = "150"
    FontSize      = "18"
    Background    = "Blue"
    Foreground    = "White"
    ShowInTaskbar = "True">

    <Grid>
        <StackPanel x:Name='StackPanel'>
        <Button x:Name="Show" Content = 'Show'/>
        <Button x:Name="Force" Content = 'Force'/>
        <Button x:Name="OK" Content = 'OK'/>
        <Button x:Name="Stop" Content = 'Stop'/>
    </StackPanel>
    </Grid>
</Window>
'@

[System.Windows.RoutedEventHandler]$Script:Handler = {
   $result = $_.source
   $MainForm.Close()
}

$Reader = New-Object System.Xml.XmlNodeReader $XAML
$MainForm = [Windows.Markup.XamlReader]::Load($Reader)
$MainForm.AddHandler([System.Windows.Controls.Primitives.ButtonBase]::ClickEvent, $Handler)
$MainForm.ShowDialog() | Out-Null
if ( $result -match 'show' ) {
  # code if "show" is selected
} elseif ( $result -match 'force' ) {
  # code if "force" is selected
}