PowerShell: Date Picker.

Quick function to prompt a user to select a date. Usage is pretty straighforward.

$var = $(DatePicker "<title>").ToShortDateString()

function DatePicker($title) {
	[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
	[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
	
	$global:date = $null
	$form = New-Object Windows.Forms.Form
	$form.Size = New-Object Drawing.Size(233,190)
	$form.StartPosition = "CenterScreen"
	$form.KeyPreview = $true
	$form.FormBorderStyle = "FixedSingle"
	$form.Text = $title
	$calendar = New-Object System.Windows.Forms.MonthCalendar
	$calendar.ShowTodayCircle = $false
	$calendar.MaxSelectionCount = 1
	$form.Controls.Add($calendar)
	$form.TopMost = $true
	
	$form.add_KeyDown({
		if($_.KeyCode -eq "Escape") {
			$global:date = $false
			$form.Close()
		}
	})
	
	$calendar.add_DateSelected({
		$global:date = $calendar.SelectionStart
		$form.Close()
	})
	
	[void]$form.add_Shown($form.Activate())
	[void]$form.ShowDialog()
	return $global:date
}

Write-Host (DatePicker "Start Date")