|Hi Mostafa, what is advising you the dos program has ambiguous fonts?|
If you are running the progam under an your WXP operating system, it must be able to support the language the dos application uses to display or print.
Google is your friend in such matters, Googling:-
wxp arabic support
produces hits such as:- http://zsigri.tripod.com/fontboard/...
Which may help. Please advise back on how you progress.
As a matter of interest, where are you based. I am in Hammersmith, West London.
Good Luck - Keep us posted.