Function Reference


_WinAPI_UnhookWindowsHookEx

Removes a hook procedure installed in a hook chain by the _WinAPI_SetWindowsHookEx function

#include <WinAPISys.au3>
_WinAPI_UnhookWindowsHookEx ( $hHook )

Parameters

$hHook Handle to the hook to be removed

Return Value

Success: True
Failure: False, call _WinAPI_GetLastError() to get extended error information

Related

_WinAPI_SetWindowsHookEx

See Also

Search UnhookWindowsHookEx in MSDN Library.

Example

#include <MsgBoxConstants.au3>
#include <StructureConstants.au3>
#include <WinAPIConstants.au3>
#include <WinAPISys.au3>
#include <WindowsConstants.au3>

Global $g_hHook, $g_hStub_KeyProc, $g_sBuffer = ""

Example()

Func Example()
        OnAutoItExitRegister("Cleanup")

        Local $hMod

        $g_hStub_KeyProc = DllCallbackRegister("_KeyProc", "long", "int;wparam;lparam")
        $hMod = _WinAPI_GetModuleHandle(0)
        $g_hHook = _WinAPI_SetWindowsHookEx($WH_KEYBOARD_LL, DllCallbackGetPtr($g_hStub_KeyProc), $hMod)

        MsgBox($MB_SYSTEMMODAL, "", "Click OK, then in notepad type..." & _
                        @CRLF & @CRLF & "Jon" & @CRLF & "AutoIt" & @CRLF & @CRLF & "Press Esc to exit script")

        Run("notepad.exe")
        WinWait("[CLASS:Notepad]")
        WinActivate("[CLASS:Notepad]")

        While 1
                Sleep(10)
        WEnd
EndFunc   ;==>Example

Func EvaluateKey($iKeycode)
        If (($iKeycode > 64) And ($iKeycode < 91)) _ ; a - z
                        Or (($iKeycode > 96) And ($iKeycode < 123)) _ ; A - Z
                        Or (($iKeycode > 47) And ($iKeycode < 58)) Then ; 0 - 9
                $g_sBuffer &= Chr($iKeycode)
                Switch $g_sBuffer
                        Case "Jon"
                                ToolTip("What can you say?")
                        Case "AutoIt"
                                ToolTip("AutoIt Rocks")
                EndSwitch
        ElseIf ($iKeycode > 159) And ($iKeycode < 164) Then
                Return
        ElseIf ($iKeycode = 27) Then ; esc key
                Exit
        Else
                $g_sBuffer = ""
        EndIf
EndFunc   ;==>EvaluateKey

; ===========================================================
; callback function
; ===========================================================
Func _KeyProc($nCode, $wParam, $lParam)
        Local $tKEYHOOKS
        $tKEYHOOKS = DllStructCreate($tagKBDLLHOOKSTRUCT, $lParam)
        If $nCode < 0 Then
                Return _WinAPI_CallNextHookEx($g_hHook, $nCode, $wParam, $lParam)
        EndIf
        If $wParam = $WM_KEYDOWN Then
                EvaluateKey(DllStructGetData($tKEYHOOKS, "vkCode"))
        Else
                Local $iFlags = DllStructGetData($tKEYHOOKS, "flags")
                Switch $iFlags
                        Case $LLKHF_ALTDOWN
                                ConsoleWrite("$LLKHF_ALTDOWN" & @CRLF)
                        Case $LLKHF_EXTENDED
                                ConsoleWrite("$LLKHF_EXTENDED" & @CRLF)
                        Case $LLKHF_INJECTED
                                ConsoleWrite("$LLKHF_INJECTED" & @CRLF)
                        Case $LLKHF_UP
                                ConsoleWrite("$LLKHF_UP: scanCode - " & DllStructGetData($tKEYHOOKS, "scanCode") & @TAB & "vkCode - " & DllStructGetData($tKEYHOOKS, "vkCode") & @CRLF)
                EndSwitch
        EndIf
        Return _WinAPI_CallNextHookEx($g_hHook, $nCode, $wParam, $lParam)
EndFunc   ;==>_KeyProc

Func Cleanup()
        _WinAPI_UnhookWindowsHookEx($g_hHook)
        DllCallbackFree($g_hStub_KeyProc)
EndFunc   ;==>Cleanup