$NewVMtreeView_AfterSelect =  $NewVMtreeView.add_AfterSelect
$NewVMtreeView_AfterSelect.Invoke({
  param(
  [Object] $sender,
  [System.Windows.Forms.TreeViewEventArgs] $eventargs
  )
  if ($eventargs.Action -eq [System.Windows.Forms.TreeViewAction]::ByMouse)
  {
      ##### Page change by click #####
      $($NewVMtreeView.Nodes[0]).add_AfterSelect({ShowPage1})
      $($NewVMtreeView.Nodes[1]).add_AfterSelect({ShowPage2})
      $($NewVMtreeView.Nodes[2]).add_AfterSelect({ShowPage2})
  }
})

# Tree view
$NewVMtreeView = New-Object  System.Windows.Forms.TreeView
$NewVMtreeView.Location = new-object System.Drawing.Point($LeftVertical,10)
$NewVMtreeView.Size = new-object System.Drawing.Size($GBlocation)
$NewVMpanel.Controls.Add($NewVMtreeView) <---- $NewVMpanel = $form

function ShowPage1 {#---------#}

$NewVMtreeView_AfterSelect =  $NewVMtreeView.add_AfterSelect
$NewVMtreeView_AfterSelect.Invoke({
  param(
  [Object] $sender,
  [System.Windows.Forms.TreeViewEventArgs] $eventargs
  )
  if ($eventargs.Action -eq [System.Windows.Forms.TreeViewAction]::ByMouse)
  {
      write-host $eventargs.Node.FullPath
      $($NewVMtreeView.Nodes[0]).add_AfterSelect({ShowPage1})
  }
})

# Typical configuration
$NewVMTVnode = $NewVMtreeView.Nodes.Add("Typical")
[void]$NewVMTVnode.Nodes.Add("Name and Location")
[void]$NewVMTVnode.Nodes.Add("Storage")
[void]$NewVMTVnode.Nodes.Add("Guest OS")
[void]$NewVMTVnode.Nodes.Add("Network")
[void]$NewVMTVnode.Nodes.Add("Create a Disk")
[void]$NewVMTVnode.Nodes.Add("Ready to Complete")

# Template configuration
$NewVMTVnode = $NewVMtreeView.Nodes.Add("Template")
[void]$NewVMTVnode.Nodes.Add("Not Implemented")