Hello Lakshman and Fred,

The next 1.9.8 Notation Composer 2.0 beta release (at www.notation.com/MidiNotateBetaRelease.htm) will include MusicXML exporting. You will be able to save a score in Composer as a MusicXML .xml file, and then open that file in a notation program such as Finale or Sibelius that supports MusicXML importing. Much of the details of the notation in the Composer score will be preserved in the export/import process, although the exact positions of all of the notation symbols will not be preserved.

Cheers
-- Mark