how to tell what tab you are on in GUICtrlCreateTab

[kor]

#include <ButtonConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <TabConstants.au3>
#include <WindowsConstants.au3>
#Region ### START Koda GUI section ### Form=
$Form2 = GUICreate("Tabbed Notebook Dialog", 527, 369, 299, 218)
$PageControl1 = GUICtrlCreateTab(8, 8, 396, 256)
$TabSheet1 = GUICtrlCreateTabItem("TabSheet1")
$Input1 = GUICtrlCreateInput("Input1", 88, 96, 145, 22)
GUICtrlSetFont(-1, 8, 400, 0, "Arial")
$TabSheet2 = GUICtrlCreateTabItem("TabSheet2")
GUICtrlSetState(-1,$GUI_SHOW)
$Input2 = GUICtrlCreateInput("Input2", 80, 80, 161, 22)
GUICtrlSetFont(-1, 8, 400, 0, "Arial")
$TabSheet3 = GUICtrlCreateTabItem("TabSheet3")
GUICtrlCreateTabItem("")
$Button1 = GUICtrlCreateButton("&OK", 166, 272, 75, 25)
$Button2 = GUICtrlCreateButton("&Cancel", 246, 272, 75, 25)
$Button3 = GUICtrlCreateButton("&Help", 328, 272, 75, 25)
GUISetState(@SW_SHOW)
#EndRegion ### END Koda GUI section ###

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit

    EndSwitch
WEnd

That is the default output from a test gui in Koda. I don't have my code im working on with me at the moment but the example should be enough to get across what I'm trying to do.

If a user is working with inputs on tab1, then clicks OK I want to preform action 1.

However if that user is working with inputs from tab2 and clicks the same OK button, I want to preform action 2. How can I make that OK button do different things depending on what tab the user is working on?

[GEOSoft]

GUICtrlRead($PageControl1)

Tabs are 0 based so the first tabitem is tab 0