How to make keypress only seen when AutoIt script is "active"

[TheLandYacht]

OK. So, I built my first script. I got it working exactly (almost) how I want it to. Only one small problem that someone will probably say "duh" at me for. In line 61, I use _IsPressed to watch for a keystroke (enter) as the trigger to accomplish what the script's built for. Problem is, it watches for ANY time the enter key's pressed, no matter whether the script window's the topmost window or not. So, I'll be typing away in my word-processor, hit enter...and it triggers the script. How do I fix that, make it so it's only triggered if the script window is topmost? Below is the part of the script I'm pretty sure is the relevant portion.

Suggestions?

While 1

    SendKeepActive("TrueSMS")


    If _IsPressed("0D") Then
        ClipPut ($aData[_GUICtrlComboBox_GetCurSel($hCombo)][1])
        Opt("WinTitleMatchMode", 2)
        WinActivate ( "TrueSMS" )
        Send("^v")
    EndIf

    Switch GUIGetMsg()

        Case $GUI_EVENT_CLOSE
            ExitLoop
        Case $hButton
            MsgBox(0,"",$aData[_GUICtrlComboBox_GetCurSel($hCombo)][1])

    EndSwitch
WEnd

[picaxe]

Something like

#include <Misc.au3>
$hGui = GUICreate("test")
GUISetState(@SW_SHOW)
$dll = DllOpen("user32.dll")
While 1
    If _IsPressed("0D", $dll) And WinActive($hGui) Then MsgBox(262144,"_IsPressed", "Return Pressed")
    If GUIGetMsg() = -3 Then ExitLoop
    Sleep(10)
WEnd
DllClose($dll)

[TheLandYacht]

I didn't use all of what you have there, but your advice DID point me in the right direction! Thanks!