Simple Prompt for Computer Name

This is a quick example on how to create a simple prompt for a computer name at the start of the task sequence.

Create the following Run PowerShell script step at the start of the task sequence before the Apply OS step (adjust the timeout value accordingly):

function Show-InputPopup {
    <#
    .SYNOPSIS
        Displays a simple popup dialog with a question and text input field.
    
    .DESCRIPTION
        Creates a Windows Forms popup that asks a question and returns the user's text input.
    
    .PARAMETER Message
        The question or message to display in the popup.
    
    .PARAMETER Title
        The title of the popup window. Defaults to "Input Required".
    
    .PARAMETER DefaultValue
        Optional default value to pre-populate in the text box.
    
    .EXAMPLE
        $userName = Show-InputPopup -Message "What is your name?"
        Write-Host "Hello, $userName!"
    
    .EXAMPLE
        $version = Show-InputPopup -Message "Enter the version number:" -Title "Version Input" -DefaultValue "1.0.0"
    #>
    [CmdletBinding()]
    param(
        [Parameter(Mandatory)]
        [string]$Message,
        
        [Parameter()]
        [string]$Title = "Input Required",
        
        [Parameter()]
        [string]$DefaultValue = ""
    )
    
    Add-Type -AssemblyName System.Windows.Forms
    Add-Type -AssemblyName System.Drawing
    
    # Create the form
    $form = New-Object System.Windows.Forms.Form
    $form.Text = $Title
    $form.Size = New-Object System.Drawing.Size(400, 180)
    $form.StartPosition = 'CenterScreen'
    $form.FormBorderStyle = 'FixedDialog'
    $form.MaximizeBox = $false
    $form.MinimizeBox = $false
    $form.TopMost = $true
    
    # Create the label
    $label = New-Object System.Windows.Forms.Label
    $label.Location = New-Object System.Drawing.Point(10, 20)
    $label.Size = New-Object System.Drawing.Size(370, 40)
    $label.Text = $Message
    $form.Controls.Add($label)
    
    # Create the text box
    $textBox = New-Object System.Windows.Forms.TextBox
    $textBox.Location = New-Object System.Drawing.Point(10, 70)
    $textBox.Size = New-Object System.Drawing.Size(360, 20)
    $textBox.Text = $DefaultValue
    $form.Controls.Add($textBox)
    
    # Create OK button
    $okButton = New-Object System.Windows.Forms.Button
    $okButton.Location = New-Object System.Drawing.Point(210, 105)
    $okButton.Size = New-Object System.Drawing.Size(75, 25)
    $okButton.Text = 'OK'
    $okButton.DialogResult = [System.Windows.Forms.DialogResult]::OK
    $form.AcceptButton = $okButton
    $form.Controls.Add($okButton)
    
    # Create Cancel button
    $cancelButton = New-Object System.Windows.Forms.Button
    $cancelButton.Location = New-Object System.Drawing.Point(295, 105)
    $cancelButton.Size = New-Object System.Drawing.Size(75, 25)
    $cancelButton.Text = 'Cancel'
    $cancelButton.DialogResult = [System.Windows.Forms.DialogResult]::Cancel
    $form.CancelButton = $cancelButton
    $form.Controls.Add($cancelButton)
    
    # Set focus to text box
    $form.Add_Shown({ $textBox.Select() })
    
    # Show the form and return the result
    $result = $form.ShowDialog()
    
    if ($result -eq [System.Windows.Forms.DialogResult]::OK) {
        return $textBox.Text
    }
    else {
        return $null
    }
}


$Prompt = "Input computer name:"
$ComputerName = Show-InputPopup -Message $prompt -Title "Computer Name"

if ($ComputerName) {
    #Pull Vars from TS:
    try {
        Import-Module DeployR.Utility
    }
    catch {}
    if (Get-Module -name "DeployR.Utility"){
        ${TSEnv:ComputerName} = $ComputerName
        Write-Host "Setting computer name to: $tsenv:ComputerName"
    }
}

This will display the following during the running task sequence:

NOTE: This does not do any error checking on allowed computer names or lengths.