VBA：用逗号和逗号在Excel中用点更改点？

Question

可能很简单，但我赶时间。

Public Sub StergeSTorOR()
Dim oRow As Range
Dim cell As Range
Dim i As Long, j As Long

    Application.ScreenUpdating = False

    For i = Selection(Selection.Count).Row To Selection.Cells(1, 1).Row Step -1

        For j = Selection(Selection.Count).Column To Selection.Cells(1, 1).Column Step -1

* *我如何循环遍历单元格的值并更改，用。同时反之亦然

        Next j

    Next i

    Application.ScreenUpdating = True

End Sub