工作表中的小写字母都变成大写

解答：请运行以下程序：(测试通过)
Sub ConvertToUpperCase()
Dim Rng As Range
Worksheets("Sheet1").UsedRange.Select
For Each Rng In Selection.Cells
If Rng.HasFormula = False Then
Rng.value = UCase(Rng.value)
End If
Next Rng
End Sub