Basic Windows form to handle manual naming of OSD Task Sequence device, including basic validation.

ExampleManualOSDRename.ps1

$tsenv = New-Object -COMObject Microsoft.SMS.TSEnvironment
$OSDComputerName = $tsenv.Value("_SMSTSMachineName")

function Show-OverrideOptionsPrompt_psf {

	#----------------------------------------------
	#region Import the Assemblies
	#----------------------------------------------
	[void][reflection.assembly]::Load('System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
	[void][reflection.assembly]::Load('System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
	[void][reflection.assembly]::Load('System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
	#endregion Import Assemblies

	#----------------------------------------------
	#region Generated Form Objects
	#----------------------------------------------
	[System.Windows.Forms.Application]::EnableVisualStyles()
	$formEnterComputerName = New-Object 'System.Windows.Forms.Form'
	$ButtonOK = New-Object 'System.Windows.Forms.Button'
	$GroupBox = New-Object 'System.Windows.Forms.GroupBox'
	$ComputerNameBox = New-Object 'System.Windows.Forms.TextBox'
	$InitialFormWindowState = New-Object 'System.Windows.Forms.FormWindowState'
	#endregion Generated Form Objects

	#----------------------------------------------
	#region Generated Events
	#----------------------------------------------
	
	$Form_StateCorrection_Load=
	{
		#Correct the initial state of the form to prevent the .Net maximized form issue
		$formEnterComputerName.WindowState = $InitialFormWindowState
	}
	
	$Form_Cleanup_FormClosed=
	{
		$OSDComputerName = $ComputerNameBox.Text.ToUpper()
		Write-Host "RAW NAME: " $OSDComputerName
		if ($OSDComputerName.Length -eq 0) 
    {
      $OSDComputerName = 'MZO-UNKNOWN-BOX'
    }
		elseif ($OSDComputerName.Length -gt 15) 
    {
      $OSDComputerName = $OSDComputerName[0..14] -join ""
    }
    elseif ($OSDComputerName -match "^[-_]|[^a-zA-Z0-9-_]")
    {
      $OSDComputerName = 'MZO-UNKNOWN-BOX'
    }
		$tsenv = New-Object -COMObject Microsoft.SMS.TSEnvironment
		$tsenv.Value("OSDComputerName") = "$($OSDComputerName)"
		Write-Host $OSDComputerName
 		#Remove all event handlers from the controls
		try
		{
			$formEnterComputerName.remove_Load($Form_StateCorrection_Load)
			$formEnterComputerName.remove_FormClosed($Form_Cleanup_FormClosed)
		}
		catch { Out-Null <# Prevent PSScriptAnalyzer warning #> }
	}
	#endregion Generated Events

	#----------------------------------------------
	#region Generated Form Code
	#----------------------------------------------
	$formEnterComputerName.SuspendLayout()
	#
	# formEnterComputerName
	#
	$formEnterComputerName.Controls.Add($ComputerNameBox)
	$formEnterComputerName.Controls.Add($ButtonOK)
	$formEnterComputerName.Controls.Add($GroupBox)
	$formEnterComputerName.AcceptButton = $ButtonOK
	$formEnterComputerName.CancelButton = $ButtonOK
	$formEnterComputerName.ControlBox = $False
	$formEnterComputerName.ClientSize = '285, 140'
	$formEnterComputerName.FormBorderStyle = 'FixedDialog'
	$formEnterComputerName.MaximizeBox = $False
	$formEnterComputerName.MaximumSize = '285, 140'
	$formEnterComputerName.MinimizeBox = $False
	$formEnterComputerName.MinimumSize = '285, 140'
	$formEnterComputerName.Name = 'formEnterComputerName'
	$formEnterComputerName.SizeGripStyle = 'Hide'
	$formEnterComputerName.StartPosition = 'CenterScreen'
	$formEnterComputerName.Text = 'Enter Computer Name'
	$formEnterComputerName.TopMost = $True
	#
	# ButtonOK
	#
	$ButtonOK.Location = '195, 70'
	$ButtonOK.Name = 'ButtonOK'
	$ButtonOK.Size = '50, 20'
	$ButtonOK.TabIndex = 2
	$ButtonOK.Text = 'OK'
	$ButtonOK.DialogResult = 'OK'
	#
	# GroupBox
	#
	$GroupBox.Location = '20, 10'
	$GroupBox.Name = 'GroupBox'
	$GroupBox.Size = '255, 50'
	$GroupBox.TabIndex = 0
	$GroupBox.TabStop = $False
	$GroupBox.Text = 'Computer name:'
	#
	# ComputerNameBox
	#
	$ComputerNameBox.Location = '25, 30'
	$ComputerNameBox.Name = 'ComputerNameBox'
	$ComputerNameBox.Size = '195, 70'
	$ComputerNameBox.TabIndex = 1
	$ComputerNameBox.Text = $OSDComputerName
	$formEnterComputerName.ResumeLayout()
	#endregion Generated Form Code

	#----------------------------------------------

	#Save the initial state of the form
	$InitialFormWindowState = $formEnterComputerName.WindowState
	#Init the OnLoad event to correct the initial state of the form
	$formEnterComputerName.add_Load($Form_StateCorrection_Load)
	#Clean up the control events
	$formEnterComputerName.add_FormClosed($Form_Cleanup_FormClosed)
	#Show the Form
	return $formEnterComputerName.ShowDialog()

} #End Function

#Call the form
Show-OverrideOptionsPrompt_psf | Out-Null

# Wrap-Up / Output for TS log
Write-Host "!--> Computer Name Output: $OSDComputerName"