Access获取Windows目录和System目录？

'复制以下代码到一模块中
Public Declare Function GetWindowsDirectory Lib "kernel32" Alias "GetWindowsDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long
Public Declare Function GetSystemDirectory Lib "kernel32" Alias "GetSystemDirectoryA" (ByVal lpBuffer As String, ByVal nSize As Long) As Long

'在程序中调用
Dim WindowsDirectory As String, SystemDirectory As String, x As Long
WindowsDirectory = Space(255)
SystemDirectory = Space(255)
x = GetWindowsDirectory(WindowsDirectory, 255)
x = GetSystemDirectory(SystemDirectory, 255)
MsgBox "Windows的安装目录是:" + WindowsDirectory+",系统目录是:" + SystemDirectory