How to Select an IE Tab and to Get the Selected IE Tab?

In this script below, I'm trying to:

1. Create an Internet Explorer, and to navigate it to a blank page.
2. Create a new tab with a blank page.
3. Create another tab again. (Please don't ask me why 'cause it's just a test.)
4. Get all the 3 object variables pointing to those 3 InternetExplorer Objects.
5. And to test to select the tab two, then to select the tab one which is fail!

#include <IE.au3>

$oIE = _IECreate("about:blank", 0, 1, 1, 1)

__IENavigate($oIE, "about:blank", 0, 0x800)

__IENavigate($oIE, "about:blank", 0, 0x800)

Local $oTabs[1]

Local $i = 1
While 1
   $oTabs[$i - 1] = _IEAttach($oIE, "instance", $i)
   If @Error = $_IEStatus_NoMatch Then
      ReDim $oTabs[$i - 1]
      ExitLoop
   EndIf
      ReDim $oTabs[$i + 1]
      $i += 1
WEnd

Sleep(3000)

_IEAction($oTabs[1], "focus")

Sleep(3000)

_IEAction($oTabs[0], "focus")

Could you please tell me how to fix that AU3 code to select and not to WinActivate() the tab because as far as I know, activating tab will make this tab at the front of the your Windows screen which I do not want because I want to automate the IE even I'm working on a different application.

Now, this is my second question! How can I get the current selected tab on a web browser, specially in Internet Explorer, even I'm in another application to read that tab's text using the _IEBodyReadText() libfunction? Thanks for any help!