关于vba中 遍历文件夹的问题

Sub getFiles()
Dim pathoffiles As String
Dim temp As String, i

pathoffiles = "D:\excel\vba"
If Right(pathoffiles, 1) <> "\" Then pathoffiles = pathoffiles & "\"
temp = Dir(pathoffiles & "*", vbDirectory + vbHidden + vbNormal + vbReadOnly + vbSystem)
Do While temp <> ""

If temp <> "." Or temp <> ".." Then
i = i + 1
Cells(i, 1) = pathoffiles & temp
temp = Dir()

End If
Loop

End Sub

想请教下上面这段代码中
条件判断 temp <> "." Or temp <> ".." 是什么意思

相关了解……