How Do I Access CheckBoxes From a Function - winforms

Question

I've created a form and dynamically added CheckBoxes and CheckBox names. How can I programmatically check one particular CheckBox from the Get-LicenseDetails function? Missing bracket has been added.
import-module MSOnline
Function Get-LicenseDetails {
Param ($upn)
$licenses = Get-MsolUser -UserPrincipalName $upn
ForEach ($license in $licenses.Licenses) {
If ($license.AccountSkuId -like '*ENTERPRISEPACK') {
$serviceName = $serviceStatus.ServicePlan.ServiceName
$checkBox.Checked = $true
}
}
}
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
$System_Drawing_Point = New-Object System.Drawing.Point
Add-Type -AssemblyName System.Windows.Forms
$form = New-Object Windows.Forms.Form
$form.Text = "Office 365 Licensing"
$form.Name = "Form1"
$form.Size = New-Object Drawing.Size #(316, 510)
#SEARCH BUTTON
$searchBtn = New-Object System.Windows.Forms.Button
$System_Drawing_Point.X = 226
$System_Drawing_Point.Y = 38
$searchBtn.Location = $System_Drawing_Point
$searchBtn.add_click({Get-LicenseDetails "user.name#domain.com"})
$searchBtn.Size = New-Object System.Drawing.Size(67, 23)
$searchBtn.Text = "Click Me"
$form.Controls.Add($searchBtn)
#CHECKBOXES
$y = 80
$Services = (Get-MsolAccountSku | Where-Object {$_.SkuPartNumber -eq "ENTERPRISEPACK"}).ServiceStatus.ServicePlan.ServiceName
ForEach ($service in $Services) {
$checkbox = New-Object System.Windows.Forms.CheckBox
$checkbox.Text = $service
$checkbox.Name = "CheckBox_$service"
$checkbox.Size = New-Object System.Drawing.Size(260,17)
$checkbox.Location = New-Object System.Drawing.Size(10,$y)
$y += 25
$form.Controls.Add($checkbox)
}
$drc = $form.ShowDialog()

Answer 1

First of all, you are missing a square Bracket where you load the System.Drawing Assembly.
You could access the CheckBox in the Get-LicenseDetails bei either passing them to the function or by accessing them using $global:. However, I wouldn't pass GUI elements to that function. Instead I would create a model (new object) and pass that to the Get-LicenseDetails method.

Answer 2

OK, I've figured it out. I used these lines in the function:
$checkBoxName = "CheckBox_" + $serviceName
$checkbox = $form.Controls | Where-Object {$_.name -eq $checkBoxName}
$checkbox.Checked = $true