Replacer for AddressOf operator in VBA?

I get "Syntax Error" when i put this first code in to a button. And what I can understand I can't use AddressOf operator in VBA (Microsoft Access). So my question is how I write this code so it works in VBA?

Button:

Code:

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EnumWindows AddressOf EnumWindowsProc, 0

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Code:

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Option Compare Database
Option Explicit

Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Declare Function EnumWindows Lib "user32.dll" (ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long

Public Function EnumWindowsProc(ByVal hwnd As Long, ByVal lParam As Long) As Long
Dim Length As Long
Dim sName As String
Dim Temp As String
Static iCount As Integer

iCount = iCount + 1
Length = GetWindowTextLength(hwnd) + 1

If Length > 1 Then
sName = Space(Length)
GetWindowText hwnd, sName, Length
If Left(sName, Length - 1) Like "Order*" Then MsgBox "window found!"
End If

EnumWindowsProc = 1
End Function

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