Dynamically add and remove content in GUI form - arrays

Question

I am trying to create in PowerShell a GUI window with dynamic content. I need to:
create a window with a random count of buttons (or other clickable items)
after a click button and related text label will be removed from the window
IMPORTANT: I cannot use a list or datagrid.
I have the following code but it still returns only last item value.
[void][System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
[void][System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
$form = New-Object System.Windows.Forms.Form
$form.Size = New-Object System.Drawing.Size(400,400)
$Array = New-Object System.Collections.ArrayList
$Array.add('AAA')
$Array.add('BBB')
$Array.add('CCC')
$Array.add('DDD')
foreach ($item in $Array) {
New-Variable -Force -Name "button$membershipCount" -Value (New-Object System.Windows.Forms.Button)
$thisButton = Get-Variable -ValueOnly -Include "button$membershipCount"
$thisButton.Location = New-Object System.Drawing.Size(175,(35+26*$membershipCount))
$thisButton.Size = New-Object System.Drawing.Size(250,23)
$thisButton.Text = $item
$thisButton.Add_Click({(Write-Host $thisButton.Text | Out-Null)})
$form.Controls.Add($CHANGEButton)
}
I also tried Invoke-Expression, but it doesn't return expected results:
Invoke-Expression -Command "`$thisButton.Add_Click({`$x=`"$($item)`";`write-host $x})"
Or any better idea how can I get details which button was clicked since the number of buttons is random?

Answer 1

The problem is that the scriptblock inside add_Click() now contains a reference to $thisbutton, which at runtime will have been replaced with the last value in the foreach loop - this is expected behavior.
You can do 1 of 2 things here.
1. Capture the $thisButton.Text (or $item) value in a closure:
# Piping to Out-Null has zero effect here, just remove it
$thisButton.Add_Click({Write-Host $thisButton.Text}.GetNewClosure())
2. Use the event arguments to determine which button was clicked at runtime:
$thisButton.Add_Click({param($Sender,$EventArgs) Write-Host $Sender.Text})