Simple Progress Bar

Hi

I am trying to get a progress bar working in my form, not having much luck. I have started a small basic script to help me better understand the functions of progress bars in forms, but even this is causing me trouble. Here is the code:

[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
  [reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null

  $form_main = New-Object System.Windows.Forms.Form

  $progressBar1 = New-Object System.Windows.Forms.ProgressBar

  $timer1 = New-Object System.Windows.Forms.Timer


  
  $form_main.Text = 'ProgressBar demo'

  $progressBar1.DataBindings.DefaultDataSourceUpdateMode = 0

  $progressBar1.Step = 1

  $progressBar1.Name = 'progressBar1'

  $progressBar1.Maximum = 100

  $progressBar1.Minimum = 0

  $form_main.Controls.Add($progressBar1)

  $timer1.Interval = 1000

  $timer1.add_tick($timer1_OnTick)

  $timer1.Start()

  $form_main.ShowDialog()| Out-Null
  
  $timer1_OnTick = {
  $progressBar1.Increment(1)
  }

I thought that this code would draw a progress bar that increments 1% each second, until it reaches 100%/100 seconds, but all it does is flip around like a fish out of water :S