Powershell Arrays

1) How do I create a dynamic array
$a = @()

2) How do I append an element to array
$a += "a"
$a += "b"

3) how do I do a UBOUND on an array
.NET array indexes are zero-based, so ubound is length-1:
$a.length - 1

Powershell - Using IE

Have successfully using Powershell to access IE. Trick to be aware of.
If you launch a web page using "New-Object -comObject InternetExplorer.Application", UAC will block you from accessing the document properties inside. Use the following technique:

  & "$env:programfiles\Internet   Explorer\iexplore.exe" 'http://powershell.com'
  $win = New-Object -comObject Shell.Application
  $try = 0
  $ie2 = $null
  do {
    Start-Sleep -milliseconds 500
    $ie2 = @($win.windows() ? { $_.locationName -like '*PowerShell*' })[0]
    $try ++
    if ($try -gt 20) {
      Throw "Web Page cannot be opened."
    }
  } while ($ie2 -eq $null)
  $ie2.document
  $ie2.Document.body.innerHTML