Option Explicit
#If VBA7 Then
Private Declare PtrSafe Function FindWindow Lib "USER32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As LongPtr
Private Declare PtrSafe Function FindWindowEx Lib "USER32" Alias "FindWindowExA" (ByVal hWnd1 As LongPtr, ByVal hWnd2 As LongPtr, ByVal lpsz1 As String, ByVal lpsz2 As String) As LongPtr
Private Declare PtrSafe Function GetWindowLong Lib "USER32" Alias "GetWindowLongA" (ByVal hWnd As LongPtr, ByVal nIndex As Long) As LongPtr
Private Declare PtrSafe Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (ByVal Destination As LongPtr, ByVal Source As LongPtr, ByVal Length As LongPtr)
Private Declare PtrSafe Function SetWindowsHookEx Lib "USER32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As LongPtr, ByVal hmod As LongPtr, ByVal dwThreadId As Long) As LongPtr
Private Declare PtrSafe Function CallNextHookEx Lib "USER32" (ByVal hHook As LongPtr, ByVal nCode As Long, ByVal wParam As LongPtr, lParam As Any) As LongPtr
Private Declare PtrSafe Function UnhookWindowsHookEx Lib "USER32" (ByVal hHook As LongPtr) As Long
Private Declare PtrSafe Function SetWindowLong Lib "USER32" Alias "SetWindowLongPtrA" (ByVal hWnd As LongPtr, ByVal nIndex As Long, ByVal dwNewLong As LongPtr) As LongPtr
#Else
Private Declare Function FindWindow Lib "USER32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function FindWindowEx Lib "USER32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Private Declare Function GetWindowLong Lib "USER32" Alias "GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (ByVal Destination As Long, ByVal Source As Long, ByVal Length As Long)
Private Declare Function SetWindowsHookEx Lib "USER32" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Private Declare Function CallNextHookEx Lib "USER32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function UnhookWindowsHookEx Lib "USER32" (ByVal hHook As Long) As Long
Private Declare Function SetWindowLong Lib "USER32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
#End If
Private Type POINTAPI: X As Long: Y As Long: End Type
Private Type MSLLHOOKSTRUCT: pt As POINTAPI: mouseData As Long: flags As Long: time As Long: dwExtraInfo As Long: End Type
Private Const HC_ACTION = 0
Private Const WH_MOUSE_LL = 14
Private Const WM_MOUSEWHEEL = &H20A
Private Const GWL_HINSTANCE = (-6)
Private udtlParamStuct As MSLLHOOKSTRUCT
' permet de savoir si le hook est activé ou pas
Public plHooking As Long
' sera associé à la ListBox
Public CtrlHooked As Object
'
Private Function GetHookStruct(ByVal lParam As Long) As MSLLHOOKSTRUCT
CopyMemory VarPtr(udtlParamStuct), lParam, LenB(udtlParamStuct)
GetHookStruct = udtlParamStuct
End Function
Private Function LowLevelMouseProc(ByVal nCode As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
'en cas de mouvement très rapide,
'évitons les crash en désactivant les erreurs
On Error Resume Next
If (nCode = HC_ACTION) Then
If wParam = WM_MOUSEWHEEL Then
LowLevelMouseProc = True
With CtrlHooked
' déplace l'ascenseur en fonction de la molette ' l'info est stockée dans lParam
If GetHookStruct(lParam).mouseData > 0 Then .TopIndex = .TopIndex - 3 Else .TopIndex = .TopIndex + 3
End With
End If
Exit Function
End If
LowLevelMouseProc = CallNextHookEx(0&, nCode, wParam, ByVal lParam)
On Error GoTo 0
End Function
Public Sub HookMouse(ByVal ControlToScroll As Object, Optional ByVal FormName As String)
Dim hWnd As Long
' active le hook s'il n'avait pas déjà été activé
If plHooking < 1 Then
hWnd = FindWindow(vbNullString, FormName)
Set CtrlHooked = ControlToScroll
' il n'y a pas de hInstance d'application, alors on utilise GetWindowLong pour obtenir l'hInstance
plHooking = SetWindowsHookEx(WH_MOUSE_LL, AddressOf LowLevelMouseProc, GetWindowLong(hWnd, GWL_HINSTANCE), 0)
End If
End Sub
Public Sub UnHookMouse()
' désactive le hook s'il existe
If plHooking <> 0 Then UnhookWindowsHookEx plHooking: plHooking = 0: Set CtrlHooked = Nothing
End Sub
