Select folder and write in a textbox the output powershell - user-interface

Question

I have created an application in powershell, and now i need to add the GUI to the app.
In this application I need to give the user the opportunity to select or write the path of a folder in a textbok. I have written this piece of code but i haven't achieved to get the output of calling the get-FolderLocation function in the texbox that i create.
Any ideas about how to achieve this?
[void][System.Reflection.Assembly]::LoadWithPartialName( “System.Windows.Forms”)
[void][System.Reflection.Assembly]::LoadWithPartialName( “Microsoft.VisualBasic”)
#####Define the form size & placement
$form = New-Object “System.Windows.Forms.Form”;
$form.Width = 500;
$form.Height = 150;
$form.Text = $title;
$form.StartPosition = [System.Windows.Forms.FormStartPosition]::CenterScreen;
##############Define text label1
$textLabel1 = New-Object “System.Windows.Forms.Label”;
$textLabel1.Left = 25;
$textLabel1.Top = 15;
$textLabel1.Text = "select the folder";
############Define text box1 for input
$textBox1 = New-Object “System.Windows.Forms.TextBox”;
$textBox1.Left = 150;
$textBox1.Top = 10;
$textBox1.width = 200;
$textBox1.Text = "selected folder"
#############define select button
$button = New-Object “System.Windows.Forms.Button”;
$button.Left = 360;
$button.Top = 85;
$button.Width = 100;
$button.Text = “Browse”;
############# the output of calling the get-Folder Location function must be shown in the textbox1
$button.Add_Click({get-Folderlocation}) ;
#############Add controls to all the above objects defined
$form.Controls.Add($button);
$form.Controls.Add($textLabel1);
$form.Controls.Add($textBox1);
$form.ShowDialog();
$textBox1.Text
$selectedDirectory
function get-Folderlocation([string]$Message, [string]$InitialDirectory, [switch]$NoNewFolderButton)
{
$browseForFolderOptions = 0
if ($NoNewFolderButton) { $browseForFolderOptions += 512 }
$app = New-Object -ComObject Shell.Application
$folder = $app.BrowseForFolder(0, $Message, $browseForFolderOptions, $InitialDirectory)
if ($folder) { $selectedDirectory = $folder.Self.Path } else { $selectedDirectory = '' }
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($app) > $null
return $selectedDirectory
}

Answer 1

You simply assign the output from get-FolderLocation to $textBox1.Text.
Since the $textBox1 variable is not in the same scope as the add_Click() scriptblock, PowerShell 3.0 and 4.0 will have issues resolving it. Use Get-Variable -Scope 1 to work around this:
$button.Add_Click({(Get-Variable -Name textBox1 -Scope 1).Value.Text = Get-Folderlocation})