How to block touch inputs in WM_TOUCH

[Mingre]

Hello forums,

My tablet's (T100TA) digitizer got broken and so the screen gets random phantom (haha) touch inputs. I can disable the whole touchscreen functionality but I can't because I really need to use the touchscreen. I can also have the digitizer replaced but unfortunately I don't have enough money to afford that now.

As seen on the attached image, I'm able to detect the touchscreen inputs on the left side of the screen. (Those are the phantom touch inputs!) Problem is, is there a way to block those inputs (so instead of it sending a primary down, nothing is passed on the windows)? What I'm going to do is to block inputs only in areas where the phantom inputs usually are.

I have done what I wanted with MrCreator's MouseOnEvent UDF with his "Restrict clicks in certain area" example but the downside is that both the touch AND mouse inputs are block.

Thanks so much!

 

Here's the WM_TOUCH code:

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#include <GUIConstantsEx.au3>
#include <GuiButton.au3>
#include <WindowsConstants.au3>
#include <StructureConstants.au3>
#include <GuiEdit.au3>
#include <WinAPI.au3>

#RequireAdmin

Global $iMemo
;Global $WM_TOUCH = 0x240
Local $hGUI

Global Const $tagTOUCHINPUT = "LONG x; LONG y; HANDLE hSource; DWORD dwID; DWORD dwFlags; DWORD dwMask; DWORD dwTime; ULONG_PTR dwExtraInfo; DWORD cxContact; DWORD cyContact"

_Main()

Func _Main()

    $hGUI = GUICreate("WM_TOUCH", 1080, 640)

    $iMemo = GUICtrlCreateEdit("", 10, 10, 300, 600, $WS_VSCROLL)
    _GUICtrlEdit_SetLimitText($iMemo, 0x80000000)
    GUICtrlSetFont($iMemo, 9, 400, 0, "Courier New")

    DllCall("User32.dll", "BOOL", "RegisterTouchWindow", "HWND", $hGUI, "ULONG", 2)

    GUIRegisterMsg($WM_TOUCH, "WM_TOUCH")

    GUISetState()

    While 1
        Switch GUIGetMsg()
            Case $GUI_EVENT_CLOSE
                ExitLoop
        EndSwitch
    WEnd

    Exit

EndFunc   ;==>_Main

Func WM_TOUCH($hWnd, $Msg, $wParam, $lParam)

    Dim $arrayTouchInput[Int($wParam)]
    $Buffer = DllStructCreate("BYTE buffer[" & (Int($wParam)*40) & "]")
    ;GUICtrlSetData($iMemo, "BYTE buffer[" & (Int($wParam)*40) & "]" & @CRLF, 1)

    $TouchInfo = DllStructCreate($tagTOUCHINPUT, DllStructGetPtr($Buffer))
    $pTouchInfo = DllStructGetPtr($TouchInfo)

    For $i = 0 To (Int($wParam)-1) Step 1
        $arrayTouchInput[$i] = DllStructCreate($tagTOUCHINPUT, ($pTouchInfo+($i*40)))
    Next

    $aRet0 = DllCall("User32.dll", "BOOL", "GetTouchInputInfo", "HANDLE", $lParam, "UINT", $wParam, "ULONG_PTR", $pTouchInfo, "int", DllStructGetSize($TouchInfo))
    ;GUICtrlSetData($iMemo, "@error: " & @error & @CRLF, 1)
    ;GUICtrlSetData($iMemo, "_WinAPI_GetLastError(): " & _WinAPI_GetLastError() & @CRLF, 1)
    ;GUICtrlSetData($iMemo, "Func0 Ret: " & $aRet0[0] & @CRLF, 1)

    GUICtrlSetData($iMemo, "************************************" & @CRLF, 1)
    GUICtrlSetData($iMemo, "Finger Numbers: " & Int($wParam) & @CRLF, 1)
    For $j = 0 To (Int($wParam)-1) Step 1
        GUICtrlSetData($iMemo, "Points " & $j & " dwID: " & DllStructGetData($arrayTouchInput[$j], "dwID") & " ", 1)
        GUICtrlSetData($iMemo, " x: " & DllStructGetData($arrayTouchInput[$j], "x")/100 & " ", 1)
        GUICtrlSetData($iMemo, " y: " & DllStructGetData($arrayTouchInput[$j], "y")/100 & @CRLF, 1)
    Next

    ;GUICtrlSetData($iMemo, "TouchInfo Size: " & DllStructGetSize($TouchInfo) & @CRLF, 1)
    ;$aRet1 = DllCall("User32.dll", "BOOL", "CloseTouchInputHandle", "HANDLE", $lParam)
    ;GUICtrlSetData($iMemo, "Func1 Ret: " & $aRet1[0] & @CRLF, 1)
    ;$TouchInfo = 0
    Return $GUI_RUNDEFMSG
 EndFunc   ;==>WM_NOTIFY

 

 

Edited August 20, 2016 by Mingre