Is there any such thing as a "relative space in Word?

[RRB]

The header of my DOC is setup like this



FIRSTWRDOFHEADER[10 spaces]CHAPTERNAME[10 spaces]SECONDWRDOFHEADER

The "chaptername" is getting its text from a field styleref("chaptername")

But sometimes the chaptername text is long enough to cause the SECONWRDOFHEADER to get pushed to the next line.

Is there a way to put a "dynamic" space in the header which will adjust its size so the text will always be on the same line?

Thank You

Susan