Need help with Callback function

Hello there pvpers
Is there anyone who can help me / explain me how to instal a low lvl hook just for specified running process ?
Theres a UDF file for Autoit that allows u to track mouse
using Callback to a low lvl mouse hook , but its a overall info

Spoiler

Code:

; ~~ Mouse Hook ~~
;For more info, Visit: http://msdn.microsoft.com/en-us/library/ms644986(VS.85).aspx

;Include GUI Consts
#include <GUIConstants.au3> ;for $GUI_EVENT_CLOSE
#Include <WinAPI.au3> ;for HIWORD

;These constants found in the helpfile under Windows Message Codes
Global Const $WM_MOUSEMOVE = 0x0200 ;mouse move
Global Const $WM_MOUSEWHEEL = 0x020A ;wheel up/down
Global Const $WM_LBUTTONDBLCLK = 0x0203 ;left button
Global Const $WM_LBUTTONDOWN = 0x0201
Global Const $WM_LBUTTONUP = 0x0202
Global Const $WM_RBUTTONDBLCLK = 0x0206 ;right button
Global Const $WM_RBUTTONDOWN = 0x0204
Global Const $WM_RBUTTONUP = 0x0205
Global Const $WM_MBUTTONDBLCLK = 0x0209 ;wheel clicks
Global Const $WM_MBUTTONDOWN = 0x0207
Global Const $WM_MBUTTONUP = 0x0208 

;Consts/structs from msdn
Global Const $MSLLHOOKSTRUCT = $tagPOINT & ";dword mouseData;dword flags;dword time;ulong_ptr dwExtraInfo"
;~ Global Const $WH_MOUSE_LL = 14           ;already declared
;~ Global Const $tagPOINT = "int X;int Y"   ;already declared

;Create GUI
$GUI = GUICreate("Mouse Hook", 178, 158, @DesktopWidth-178, 0) ;Top-Left corner
$_Event = GUICtrlCreateLabel("Event: ", 8, 8, 158, 17)
$_XYpos = GUICtrlCreateLabel("X=     Y=", 8, 32, 157, 17)
$_MData = GUICtrlCreateLabel("Mouse Data: ", 8, 56, 165, 17)
$_Flags = GUICtrlCreateLabel("Flags: ", 8, 80, 168, 17)
$_Timestamp = GUICtrlCreateLabel("Timestamp: ", 8, 104, 162, 17)
$_Extra = GUICtrlCreateLabel("Extra Info: ", 8, 128, 167, 17)
GUISetState()
WinSetOnTop($GUI, "", 1) ;make GUI stay on top of other windows

;Register callback
$hKey_Proc = DllCallbackRegister("_Mouse_Proc", "int", "int;ptr;ptr")
$hM_Module = DllCall("kernel32.dll", "hwnd", "GetModuleHandle", "ptr", 0)
$hM_Hook = DllCall("user32.dll", "hwnd", "SetWindowsHookEx", "int", $WH_MOUSE_LL, "ptr", DllCallbackGetPtr($hKey_Proc), "hwnd", $hM_Module[0], "dword", 0)


While 1
    If $GUI_EVENT_CLOSE = GUIGetMsg() Then Exit ;idle until exit is pressed
WEnd

Func _Mouse_Proc($nCode, $wParam, $lParam) ;function called for mouse events..
    ;define local vars
    Local $info, $ptx, $pty, $mouseData, $flags, $time, $dwExtraInfo
    Local $xevent = "Unknown", $xmouseData = ""
    
    If $nCode < 0 Then ;recommended, see http://msdn.microsoft.com/en-us/library/ms644986(VS.85).aspx
        $ret = DllCall("user32.dll", "long", "CallNextHookEx", "hwnd", $hM_Hook[0], _
                "int", $nCode, "ptr", $wParam, "ptr", $lParam) ;recommended
        Return $ret[0]
    EndIf
    
    $info = DllStructCreate($MSLLHOOKSTRUCT, $lParam) ;used to get all data in the struct ($lParam is the ptr)
    $ptx = DllStructGetData($info, 1) ;see notes below..
    $pty = DllStructGetData($info, 2)
    $mouseData = DllStructGetData($info, 3)
    $flags = DllStructGetData($info, 4)
    $time = DllStructGetData($info, 5)
    $dwExtraInfo = DllStructGetData($info, 6)
    ; $ptx = Mouse x position
    ; $pty = Mouse y position
    ; $mouseData = can specify click states, and wheel directions
    ; $flags = Specifies the event-injected flag
    ; $time = Specifies the time stamp for this message
    ; $dwExtraInfo = Specifies extra information associated with the message. 

    ;Find which event happened
    Select
        Case $wParam = $WM_MOUSEMOVE
            $xevent = "Mouse Move"
        Case $wParam = $WM_MOUSEWHEEL
            $xevent = "Mouse Wheel"
            If _WinAPI_HiWord($mouseData) > 0 Then
                $xmouseData = "Wheel Forward"
            Else
                $xmouseData = "Wheel Backward"
            EndIf
        Case $wParam = $WM_LBUTTONDBLCLK
            $xevent = "Double Left Click"
        Case $wParam = $WM_LBUTTONDOWN
            $xevent = "Left Down"
        Case $wParam = $WM_LBUTTONUP
            $xevent = "Left Up"
        Case $wParam = $WM_RBUTTONDBLCLK
            $xevent = "Double Right Click"
        Case $wParam = $WM_RBUTTONDOWN
            $xevent = "Right Down"
        Case $wParam = $WM_RBUTTONUP
            $xevent = "Right Up"
        Case $wParam = $WM_MBUTTONDBLCLK
            $xevent = "Double Wheel Click"
        Case $wParam = $WM_MBUTTONDOWN
            $xevent = "Wheel Down"
        Case $wParam = $WM_MBUTTONUP
            $xevent = "Wheel Up"
    EndSelect
    
    ; Set GUI control data..
    GUICtrlSetData($_Event, "Event: " & $xevent)
    GUICtrlSetData($_XYpos, "X=" & $ptx & "     Y=" & $pty)
    If $xmouseData <> "" Then
        GUICtrlSetData($_MData, "Mouse Data: " & $xmouseData)
    Else
        GUICtrlSetData($_MData, "Mouse Data: " & $mouseData)
    EndIf
    GUICtrlSetData($_Flags, "Flags: " & $flags)
    GUICtrlSetData($_Timestamp, "Timestamp: " & $time)
    GUICtrlSetData($_Extra, "Extra Info: " & $dwExtraInfo)
    
    ;This is recommended instead of Return 0
    $ret = DllCall("user32.dll", "long", "CallNextHookEx", "hwnd", $hM_Hook[0], _
            "int", $nCode, "ptr", $wParam, "ptr", $lParam)
    Return $ret[0]
EndFunc   ;==>_Mouse_Proc

Func OnAutoItExit()
    DllCall("user32.dll", "int", "UnhookWindowsHookEx", "hwnd", $hM_Hook[0])
    $hM_Hook[0] = 0
    DllCallbackFree($hKey_Proc)
    $hKey_Proc = 0
EndFunc   ;==>OnAutoItExit

Ok so i did a bit of research, and ended up with this

Spoiler

^
This code (if i wrote it correctly should catch up events with LL_Injected flag
clean them and send forward using CallNextHookEx

Look like its working but :P
Mouse is acting weird due to delays.

Im not an AutoIt Vet if it comes to dllcalls and hooks like this one
I dont want to screw up anything.... so if theres anyone willing to help me, dm me and ill send u my discord tag in case of future questions