'in a form
Private Sub Form_load()
Hook.lpfn = Adresspackajing(AddressOf Interceptor) 'whao! un puntero a una funcion..hay k hoderse XD
Hook.idHook = WH_CBT 

Hook.hmod = App.hInstance 
Dim find As Long, fi As Long
Dim a As Long

a = Shell("notepad.exe")
find = FindWindow("Notepad", vbNullString)
Hook.dwThreadId = GetWindowThreadProcessId(find, fi)
Hook.hhooKRET = SetWindowsHookEx(Hook.idHook, Hook.lpfn, Hook.hmod, Hook.dwThreadId)  
End Sub

Public Function Adresspackajing(ByVal Add As Long) As Long
Adresspackajing = Add
End Function

'in a module
Declare Function GetWindowThreadProcessId Lib "user32" Alias "GetWindowThreadProcessId" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Public 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 Type T_Hookguay
        idHook As Long
        lpfn As Long
        hmod As Long
        dwThreadId As Long
        hhooKRET As Long
End Type
Public Hook As T_Hookguay
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal nCode As Long, ByVal wParam As Long, lParam As Any) As Long
Public Const WH_CBT = 5
Public Const HCBT_DESTROYWND As Long = 4


Public Function Interceptor(ByVal lMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    If lMsg < 0 Then
        Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, lParam)
    Else
    Select Case lMsg
    Case HCBT_DESTROYWND
    MsgBox ("siiii")
    End Select
        Interceptor = CallNextHookEx(Hook.hhooKRET, lMsg, wParam, lParam)
    End If
End Function