### Creating the form with the Windows forms namespace
Add-Type -AssemblyName System.Windows.Forms
Add-Type -AssemblyName System.Drawing
$form = New-Object System.Windows.Forms.Form
$form.Text = 'Enter the appropriate information' ### Text to be displayed in the title
$form.Size = New-Object System.Drawing.Size(310,625) ### Size of the window
$form.StartPosition = 'CenterScreen'  ### Optional - specifies where the window should start
$form.FormBorderStyle = [System.Windows.Forms.FormBorderStyle]::FixedToolWindow  ### Optional - prevents resize of the window
#$form.Topmost = $true  ### Optional - Opens on top of other windows

### Adding an OK button to the text box window
$OKButton = New-Object System.Windows.Forms.Button
$OKButton.Location = New-Object System.Drawing.Point(155,550) ### Location of where the button will be
$OKButton.Size = New-Object System.Drawing.Size(75,23) ### Size of the button
$OKButton.Text = 'OK' ### Text inside the button
$OKButton.DialogResult = [System.Windows.Forms.DialogResult]::OK
$form.AcceptButton = $OKButton
$form.Controls.Add($OKButton)

### Adding a Cancel button to the text box window
$CancelButton = New-Object System.Windows.Forms.Button
$CancelButton.Location = New-Object System.Drawing.Point(70,550) ### Location of where the button will be
$CancelButton.Size = New-Object System.Drawing.Size(75,23) ### Size of the button
$CancelButton.Text = 'Cancel' ### Text inside the button
$CancelButton.DialogResult = [System.Windows.Forms.DialogResult]::Cancel
$form.CancelButton = $CancelButton
$form.Controls.Add($CancelButton)

### Putting a label above the text box
$label = New-Object System.Windows.Forms.Label
$label.Location = New-Object System.Drawing.Point(10,10) ### Location of where the label will be
$label.AutoSize = $True
$Font = New-Object System.Drawing.Font("Arial",12,[System.Drawing.FontStyle]::Bold) ### Formatting text for the label
$label.Font = $Font
$label.Text = $Input_Type ### Text of label, defined by the parameter that was used when the function is called
$label.ForeColor = 'Red' ### Color of the label text
$form.Controls.Add($label)

### Inserting the text box that will accept input
$textBox = New-Object System.Windows.Forms.TextBox
$textBox.Location = New-Object System.Drawing.Point(10,40) ### Location of the text box
$textBox.Size = New-Object System.Drawing.Size(275,500) ### Size of the text box
$textBox.Multiline = $true ### Allows multiple lines of data
$textbox.AcceptsReturn = $true ### By hitting enter it creates a new line
$textBox.ScrollBars = "Vertical" ### Allows for a vertical scroll bar if the list of text is too big for the window
$form.Controls.Add($textBox)

$form.Add_Shown({$textBox.Select()}) ### Activates the form and sets the focus on it
$result = $form.ShowDialog() ### Displays the form 
 
### If the OK button is selected do the following
if ($result -eq [System.Windows.Forms.DialogResult]::OK)
{
    ### Removing all the spaces and extra lines
    $x = $textBox.Lines | Where{$_} | ForEach{ $_.Trim() }
    ### Putting the array together
    $array = @()
    ### Putting each entry into array as individual objects
    $array = $x -split "`r`n"
    ### Sending back the results while taking out empty objects
    Return $array | Where-Object {$_ -ne ''}
}
 
### If the cancel button is selected do the following
if ($result -eq [System.Windows.Forms.DialogResult]::Cancel)
{
    Write-Host "User Canceled" -BackgroundColor Red -ForegroundColor White
    Write-Host "Press any key to exit..."
    $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")
    Exit
}





###############################################################################
### User Name(s) example of how to utilize the GUI_TextBox function
###############################################################################
$Users = GUI_TextBox "User Names(s):" ### Calls the text box function with a parameter and puts returned input in variable
$User_Count = $Users | Measure-Object | % {$_.Count} ### Measures how many objects were inputted
 
If ($User_Count -eq 0){ ### If the count returns 0 it will throw and error
    Write-Host "Nothing was inputed..." -BackgroundColor Red -ForegroundColor White
    Return
}
Else { ### If there was actual data returned in the input, the script will continue
    Write-Host "Number of users entered:" $User_Count -BackgroundColor Cyan -ForegroundColor Black
    $Users
    ### Here is where you would put your specific code to take action on those users inputted
}

