i would suggest you use the full paragraph instead of asking Word to determine what is a sentence. I haven't tested this but the following changes might do the job...

Replace:
oRng.Start = oRng.Sentences(1).Start
oRng.End = oRng.Sentences(1).End

With:
Set oRng = oRng.Paragraphs(1).Range

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Andrew Lockton
Chrysalis Design, Melbourne Australia