在模块中用VBA实现启用或禁用ACCESS程序的关闭按钮：

Private Declare Function GetSystemMenu Lib "user32" (ByVal hwnd As Long, ByVal wRevert As Long) As Long
Private Declare Function EnableMenuItem Lib "user32" (ByVal hMenu As Long, ByVal wIDEnableItem As Long, ByVal wEnable As Long) As Long


Public Sub AccessCloseButtonEnabled(pfEnabled As Boolean)
  ' Comments: Control the Access close button.
  '           Disabling it forces the user to exit within the application
  ' Params  : pfEnabled       TRUE enables the close button, FALSE disabled it
  ' Owner   : Copyright (c) FMS, Inc.
  ' Source  : Total Visual SourceBook
  ' Usage   : Permission granted to subscribers of the FMS Newsletter


  On Error Resume Next


  Const clngMF_ByCommand As Long = &H0&
  Const clngMF_Grayed As Long = &H1&
  Const clngSC_Close As Long = &HF060&


  Dim lngWindow As Long
  Dim lngMenu As Long
  Dim lngFlags As Long


  lngWindow = Application.hWndAccessApp
  lngMenu = GetSystemMenu(lngWindow, 0)
  If pfEnabled Then
    lngFlags = clngMF_ByCommand And Not clngMF_Grayed
  Else
    lngFlags = clngMF_ByCommand or clngMF_Grayed
  End If
  Call EnableMenuItem(lngMenu, clngSC_Close, lngFlags)
End Sub


'Disabling the Close Button: Call AccessCloseButtonEnabled(False)


'Enabling the Close Button: Call AccessCloseButtonEnabled(True)