取得某个目录底下所有文件大小总和

答案：
取得某个目录底下所有文件大小总和
含目录底下的子目录，求得其所有文件大小之总和其第二个叁数的目的是起始Static型态的totbyte, 呼叫它时，请不要传叁数进去
   Private Sub Command1_Click()
   Dim tot As Long
   tot = GetDirTotalByte("c:\tools\")
   Debug.Print tot
   End Sub
   Private Function GetDirTotalByte(CurrentPath As String, Optional i As Long) As Long
    Static totbyte As Long
    Dim nI As Integer, nDirectory As Integer
    Dim sFileName As String, sDirectoryList() As String
    注释：Initial totbyte, if it is not the Recursive call the function
    If i <> 1 Then
       totbyte = 0
    End If
    注释：First list all normal files in this directory
    sFileName = Dir(CurrentPath, vbNormal + vbHidden + vbReadOnly + vbSystem + vbArchive)
    Do While sFileName <> ""
       totbyte = totbyte + FileLen(CurrentPath + sFileName)
       sFileName = Dir
    Loop
   注释：Next build temporary list of subdirectories
    sFileName = Dir(CurrentPath, vbDirectory)
     Do While sFileName <> ""
        注释：Ignore current and parent directories
        If sFileName <> "." And sFileName <> ".." Then
           注释：Ignore nondirectories
            If GetAttr(CurrentPath & sFileName) _
                  And vbDirectory Then
               nDirectory = nDirectory + 1
               ReDim Preserve sDirectoryList(nDirectory)
               sDirectoryList(nDirectory) = CurrentPath & sFileName
            End If
        End If
        sFileName = Dir
      Loop
    注释：Recursively process each directory
      For nI = 1 To nDirectory
          GetDirTotalByte sDirectoryList(nI) & "\", 1
      Next nI
      GetDirTotalByte = totbyte
     End Function
 

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