Not quite sure why you need to highlight. If you just want to underline, then this should work whithout selection, highlights, etc:

oWord.activedocument.RANGE(5,10).Font.Underline=1

>Hi All,
>I am having a difficult time getting my code to select (highlite) a word just so I can underline it. I am using the following code:
>
>

oWord.Selection.MoveLeft(wdCharacter, lnCount)

>
>where lnCount is the number of characters to be underlined. Does anyone have any ideas?
>Thanks,