Excel VBA a minúsculas

' To lower, upper and proper case
Dim sText As String
sText = "Run, forrest run"
MsgBox StrConv(sText, vbProperCase)   ' Run, Forrest Run
MsgBox StrConv(sText, vbLowerCase)    ' run, forrest run
MsgBox StrConv(sText, vbUpperCase)    ' RUN, FORREST RUN
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