How to change NotesFont in OutOfOffice?

I am trying to modify the OutOfOffice agent, to send email formatted with ARIAL.Instead of

“Me.m_oRTStyleNormal.NotesFont=FONT_HELV”

I used

“Me.m_oRTStyleNormal.NotesFont=5”

5 is the ARIAL font.

=> This change didn’t have any effect. Also setting NotesFont to FONT_COURIER (4) or FONT_HELV (1) did not work.

Who does change my font???