Storing variable from listbox - powershell

Question

I'm attempting to gather user input and store it using $contacttype later on in my script. Originally I was using a simple text input, however I'm now trying to use a listbox to get user input instead.
Originally I was doing this:
[System.Reflection.Assembly]::LoadWithPartialName('Microsoft.VisualBasic') | Out-Null
$contacttype = [Microsoft.VisualBasic.Interaction]::InputBox("Enter the contact type", " ")
However, I'm now trying to use a listbox with something like:
$listBox = New-Object System.Windows.Forms.ListBox
$listBox.Location = New-Object System.Drawing.Point(10,40)
$listBox.Size = New-Object System.Drawing.Size(260,20)
$listBox.Height = 80
[void] $listBox.Items.Add("VPN")
[void] $listBox.Items.Add("Phone")
[void] $listBox.Items.Add("E-mail")
$form.Controls.Add($listBox)
$form.Topmost = $True
$result = $form.ShowDialog()
if ($result -eq [System.Windows.Forms.DialogResult]::OK)
{
$x = $listBox.SelectedItem
$x
}
How do I make sure $contacttype is populated with the output from the selected listbox item?

Answer 1

Per your answer, you just need to make sure you return your result to the $contacttype variable. However the code you provided wasn't complete, it didn't include the part that initiated $form or add an OK button to trigger the ok result.
Here's a complete version that I've also moved in to a function to show how you could make this a little more reusable:
Function Invoke-ListForm {
Param(
[string[]] $ListItem
)
$Form = New-Object system.Windows.Forms.Form
$listBox = New-Object System.Windows.Forms.ListBox
$listBox.Location = New-Object System.Drawing.Point(10,40)
$listBox.Size = New-Object System.Drawing.Size(260,20)
$listBox.Height = 80
ForEach ($Item in $ListItem) {
[void] $listBox.Items.Add($Item)
}
$listBox.Add_Click({ $listBox.SelectedItem })
$Form.Controls.Add($listBox)
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Point(75,120)
$OKButton.Size = New-Object System.Drawing.Size(75,23)
$OKButton.Text = "OK"
$OKButton.DialogResult = [System.Windows.Forms.DialogResult]::OK
$Form.AcceptButton = $OKButton
$Form.Controls.Add($OKButton)
$Form.Topmost = $True
$Result = $form.ShowDialog()
if ($result -eq [System.Windows.Forms.DialogResult]::OK)
{
$listBox.SelectedItem
}
}
$ContactType = Invoke-ListForm VPN,Phone,E-mail
$ContactType