[Lazarus] Question {%MainUnit} IDE directive

[Vojtěch Čihák]

Hello,
 
I have a small question about this directive.
 
If I use: {%MainUnit ../umain.pas}
 
is it problem when someone will open this project under Windows?
I mean slash / backslash.
 
I looked here: http://wiki.freepascal.org/IDE_directives, this directive is not mentioned there.
 
Thanks.
 
BTW, Happy new year !