Как узнать текущую позицию "scroll"-а, и в какую сторону она крутится? - VB

'Global Declarations 
 
Public Type POINTAPI 
X As Long 
Y As Long 
End Type 
 
Public Type MSG 
hwnd As Long 
message As Long 
wParam As Long 
lParam As Long 
time As Long 
pt As POINTAPI 
End Type 
 
Public Declare Function CallNextHookEx& Lib 'user32' (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Integer, lParam As Any) 
 
Public Declare Function GetCurrentThreadId Lib 'kernel32' () As Long 
 
Public Declare Function RegisterWindowMessage& Lib 'user32' Alias 'RegisterWindowMessageA' (ByVal lpString As String) 
 
Public Declare Function SetWindowsHookEx& Lib 'user32' Alias 'SetWindowsHookExA' (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) 
 
Public Declare Function UnhookWindowsHookEx& Lib 'user32' (ByVal hHook As Long) 
 
Public Const WH_GETMESSAGE = 3 
Public Const MSH_MOUSEWHEEL = 'MSWHEEL_ROLLMSG' 
Public IMWHEEL_MSG As Long 
Public HWND_HOOK As Long 
 
'Код 
 
Public Function IMWheel(ByVal nCode As Long, ByVal wParam As Long, lParam As MSG) As Long 
 
If lParam.message = IMWHEEL_MSG Then 
 
Form1.WheelMoved lParam.wParam, lParam.pt.X, lParam.pt.Y 
End If 
IMWheel = CallNextHookEx(HWND_HOOK, nCode, wParam, 
lParam) 
End Function 
 
Public Function IMWheel_Hook() As Long 
IMWHEEL_MSG = 
RegisterWindowMessage(MSH_MOUSEWHEEL) 
HWND_HOOK = SetWindowsHookEx(WH_GETMESSAGE, _ 
AddressOf IMWheel, 0, GetCurrentThreadId) 
End Function 
 
Public Sub IMWheel_Unhook() 
UnhookWindowsHookEx HWND_HOOK 
End Sub 
put this code In a form: 
Option Explicit 
 
Private Sub Form_Load() 
IMWheel_Hook 
End Sub 
 
Public Sub WheelMoved(ByVal delta As Long, _ 
X As Long, Y As Long) 
Debug.Print delta, X, Y 
End Sub 
 
Private Sub Form_Unload(Cancel As Integer) 
IMWheel_Unhook 
End Sub