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Focus while intercepting output from an usb barcode scanner

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I have a little touchscreen kiosk with an usb barcode scanner, and have problems intercepting what is coming from the barcode scanner.

My problem is that i need to keep focus on the edit box to intercept what is coming from the scanner, while it also is necessary to be able to click on the main form (not on the same time)

I'm using a main form (IE Embedded) and a little form with an edit box where the barcode scanner can put in what it is scanning (10 digits and then run a function.)

#include <GUIConstants.au3>
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#include <IE.au3>

HotKeySet("!q", "MyExit")

;Create hidden control for barcode scanner
$hidden_hwnd = GUICreate("Barcode_Scanner_input", 50, 50,850,10)
$hInputControl = GUICtrlCreateInput("CPR", 10, 10, 40)

;Create main form
Global $Form = GUICreate("Main", 800, 600, 0, 0, BitOR($WS_EX_TOPMOST ,$WS_BORDER, $WS_POPUP))
Global $oIE = _IECreateEmbedded()
Global $GUIActiveX = GUICtrlCreateObj($oIE, 0, 0, 800, 600)
_IENavigate ($oIE, "http://www.autoitscript.com/forum/index.php?")
WinSetOnTop($Form, '', 1)       ; Makes sure that GUI is always OnTop

;_WinAPI_ShowCursor($CursorHidden)      ; Hide cursor in GUI

While 1
    ControlFocus( "Barcode_Scanner_input", "", "[CLASS:Edit; INSTANCE:1]")

; Functions which reads the barcodescanner input
Func CheckCPR()
    $input_control_read = GUICtrlRead($hInputControl)
    If StringLen($input_control_read) = 10 And StringIsDigit($input_control_read) Then
        ;XMLWrite("2", $input_control_read)
        GUICtrlSetData($hInputControl, "")

; For ending program
Func MyExit()

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Updated: 22/04/2018

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I also use barcode readers to input data. Instead of relying on emulated serial mode, which may not be available with every BC reader around, there is a possibility to intercept a reader's data even in emulated keyboard mode, which is what most USB readers provide. The bonus is that using this approach you can differentiate between what the user types on the keyboard and what the reader sends in keyboard mode. If you can afford choosing your barcode format, you can have full control over where the incomming data will show up by changing focus on the fly. I don't remember all the gory details right now, but it works reliably as far as I can tell.

Drop me a PM if you're interested in a short sample of the code I have to do this. I've been able to use a more direct way in my applications so I don't use this code any more, but it should be easy enough to change it to suit your needs.

This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.
Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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