Function Reference

_WinAPI_CallNextHookEx

Passes the hook information to the next hook procedure in the current hook chain

#include <WinAPISys.au3>
_WinAPI_CallNextHookEx ( $hHook, $iCode, $wParam, $lParam )

Parameters

$hHook Parameter ignored.
$iCode Specifies the hook code passed to the current hook procedure. The next hook procedure uses this code to determine how to process the hook information
$wParam Specifies the wParam value passed to the current hook procedure.
The meaning of this parameter depends on the type of hook associated with the current hook chain
$lParam Specifies the lParam value passed to the current hook procedure.
The meaning of this parameter depends on the type of hook associated with the current hook chain

Return Value

Returned by the next hook procedure in the chain.

Related

$tagKBDLLHOOKSTRUCT, _WinAPI_SetWindowsHookEx

See Also

Search CallNextHookEx in MSDN Library.

Example

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