flexList.ps1

[reflection.assembly]::loadwithpartialname(“System.Windows.Forms”) | Out-Null
[reflection.assembly]::loadwithpartialname(“System.Drawing”) | Out-Null

$form = New-Object Windows.Forms.Form
$form.text = "FlexList"
$form.ClientSize = New-Object System.Drawing.Size(300,270)
$form.ShowIcon = $false
$form.FormBorderStyle = 'Fixed3D'
$form.MaximizeBox = $false

$textfield = New-Object Windows.Forms.TextBox
$textfield.Location = New-Object Drawing.Point 50,30
$textfield.Size = New-Object Drawing.Point 200,30

$buttonAdd = New-Object Windows.Forms.Button
$buttonAdd.text = "Add user"
$buttonAdd.Location = New-Object Drawing.Point 100,60

$label = New-Object Windows.Forms.Label
$label.Location = New-Object Drawing.Point 50,120
$label.Size = New-Object Drawing.Point 200,15
$label.text = "Users list :"

$listbox = New-Object System.Windows.Forms.ListBox
$listbox.Location = New-Object System.Drawing.Size(50,140)
$listbox.Size = New-Object System.Drawing.Size(200,30)
$listbox.Height = 80

$buttonRemove = New-Object Windows.Forms.Button
$buttonRemove.text = "Remove selected user"
$buttonRemove.Location = New-Object Drawing.Point 100,220
$buttonRemove.enabled = $false


$buttonAdd.add_click({
    If ($textfield.text.Length -ne 0) {
        [void] $listbox.Items.Add($textfield.text)
        $textfield.text = ""
        $textfield.Focus()
        $form.refresh()
    }
})

$buttonRemove.add_click({
    $listbox.Items.Remove($listbox.SelectedItem)
    If ($listbox.Items.Count -eq 0) {
        $buttonRemove.enabled = $false
        $textfield.Focus()
        $form.refresh()
    }
})

$listbox.add_SelectedIndexChanged({
    $buttonRemove.enabled = $true
    $form.refresh()
})

$form.controls.add($buttonAdd)
$form.controls.add($buttonRemove)
$form.controls.add($label)
$form.controls.add($textfield)
$form.controls.add($listbox)
$form.ShowDialog()| Out-Null