PowerShell checkbox controls button function - forms

Question

This is my very first school project in PowerShell. Its going to be simple. Type path and press button to Get-Acl, which works, but I want to have an option for recurse. Which also works, but I have not been able to make a checkbox determine what function button has.. Specifically The checkboxstatechanged is what I need help with.
function ChckBx_chkd {
$table = Get-ChildItem -directory -path $Textbox1.Text -recurse
$Rtbx = #()
foreach ($dir in $table)
{
$Access = (Get-Acl $dir.FullName).Access
$Rtbx += $dir.PSPath
$Rtbx += $Access | Format-Table | out-string
}
}
function ChkcBx_unchkd {
$Rtbx.Text = (Get-Acl $Textbox1.Text).Access| Format-Table| Out-String
}
$Form = New-Object System.Windows.Forms.Form
#Själva Formen
$Form.Text = "ACL GUI"
$Font = New-Object System.Drawing.Font("Lucida Console",8)
$Form.Font = $Font
$Form.Width = 1000
$Form.Height = 500
$Rtbx = New-Object System.Windows.Forms.RichTextBox
$Rtbx.Location = '200, 100'
$Rtbx.Width = 750
$Rtbx.Font = $Font
$Rtbx.Height = 300
$Rtbx.Font
$Form.Controls.Add($Rtbx)
$Chkbx1 = New-Object System.Windows.Forms.CheckBox
$Chkbx1.Location = '50, 150'
$Chkbx1.Text = "undermappar"
$Chkbx1.Checked = $true
$Chkbx1.Add_CheckStateChanged({
if($Chkbx1.checked) {
$Btn1Click = ChckBx_chkd
}
else
{
$Btn1Click = ChkcBx_unchkd
}
})
$Form.Controls.Add($Chkbx1)
$Textbox1 = New-Object System.Windows.Forms.TextBox
$Textbox1.Location = '50, 50'
$Textbox1.Width = 700
$Form.Controls.Add($Textbox1)
$Btn1 = New-Object System.Windows.Forms.Button
$Btn1.Location = '50, 100'
$Btn1.Text = "Get ACL"
$Btn1.Font =
$Btn1.Width = 100
$Btn1.Add_Click($Btn1Click)
$Form.Controls.Add($Btn1)
$Form.ShowDialog()

Answer 1

I have to say that with the code formatted as it is, it makes it very hard to see where the functions and loops start and end. Pick a style a stick with it.
Your function names are spelt oddly which is confusing ChckBx_unchkd and ChkcBx_chkd - why reverse ck in the prefix?
Your ChkcBx_chkd code doesn't appear to work - you're redefining the variable $Rtbx as an array where you want to set the .Text property.
You have no default value set so $Btn1Click is undefined until you change the checkbox state at least once.
Your assignment of $Btn1Click = ChckBx_chkd actually calls that function at that point where you appear be using it as a reference which you then call later. You should do $Btn1Click = "ChckBx_chkd" (i.e. a string name of the function) then later use Invoke-Expression $Btn1Click
The scope of your variables is not the same. Changing $Btn1Click does not affect the value. Write-Host is your friend - print the variables out to help you debug what values they have. I've used Get-Variable/Set-Variable so I can use the variables in the global scope.
Revised code
function ChckBx_chkd {
Write-Host "ChckBx_chkd called"
$table = Get-ChildItem -directory -path $Textbox1.Text -recurse
$Rtbx.Text = ""
foreach ($dir in $table) {
$Access = (Get-Acl $dir.FullName).Access
$Rtbx.Text += $dir.PSPath
$Rtbx.Text += $Access | Format-Table | out-string
}
}
function ChkcBx_unchkd {
Write-Host "ChkcBx_unchkd called"
$Rtbx.Text = (Get-Acl $Textbox1.Text).Access | Format-Table| Out-String
}
Set-Variable -Name Btn1Click -Value "ChckBx_chkd" -Scope Global
$Font = New-Object System.Drawing.Font("Lucida Console",8)
$Form = New-Object System.Windows.Forms.Form
$Form.Text = "ACL GUI"
$Form.Font = $Font
$Form.Width = 1000
$Form.Height = 500
$Rtbx = New-Object System.Windows.Forms.RichTextBox
$Rtbx.Location = '200, 100'
$Rtbx.Width = 750
$Rtbx.Font = $Font
$Rtbx.Height = 300
$Rtbx.Font
$Form.Controls.Add($Rtbx)
$Chkbx1 = New-Object System.Windows.Forms.CheckBox
$Chkbx1.Location = '50, 150'
$Chkbx1.Text = "undermappar"
$Chkbx1.Checked = $true
$Chkbx1.Add_CheckStateChanged({
Write-Host $Chkbx1.checked $(Get-Variable -Name Btn1Click -Scope Global).Value
if ($Chkbx1.checked) {
Set-Variable -Name Btn1Click -Value "ChckBx_chkd" -Scope Global
} else {
Set-Variable -Name Btn1Click -Value "ChkcBx_unchkd" -Scope Global
}
Write-Host $Chkbx1.checked $(Get-Variable -Name Btn1Click -Scope Global).Value
})
$Form.Controls.Add($Chkbx1)
$Textbox1 = New-Object System.Windows.Forms.TextBox
$Textbox1.Location = '50, 50'
$Textbox1.Width = 700
$Form.Controls.Add($Textbox1)
$Btn1 = New-Object System.Windows.Forms.Button
$Btn1.Location = '50, 100'
$Btn1.Text = "Get ACL"
$Btn1.Font =
$Btn1.Width = 100
$Btn1.Add_Click({Invoke-Expression $(Get-Variable -Name Btn1Click -Scope Global).Value})
$Form.Controls.Add($Btn1)
$Form.ShowDialog()