PowerShell: show pop up dialog

Add-Type -AssemblyName PresentationCore,PresentationFramework
$ButtonType = [System.Windows.MessageBoxButton]::YesNo
$MessageIcon = [System.Windows.MessageBoxImage]::Question
$MessageBody = "Are you sure you want to proceed?"
$MessageTitle = "Confirm"

$Result = [System.Windows.MessageBox]::Show($MessageBody,$MessageTitle,$ButtonType,$MessageIcon)

Write-Host "Your choice is $Result"