if you have a form or picturebox handy then it's easy
Code:
Dim sngTextWidth As Single 'Width of text in whatever scalemode your form's in
Dim sngTextWidthTwips As Single 'width of text in twips
'Get the width of the form in some scalemode
sngTextWidth = Form1.TextWidth("Hello")
'Convert to twips
sngTextWidthTwips = Form1.ScaleX(sngTextWidth, Form1.ScaleMode, vbTwips)
MsgBox """Hello"" is " & sngTextWidthTwips & " Twips Wide."
hope it helps