help with mbcs (multi byte character set)

[greenapplesodaex]

i'm making a c++ program (.net 2003 envir, english xp) with chinese words in them. i first go into my computer-> control setting-> regional and language blah, under the advance tap, i choose something that supports chinese (like chinese prc) and then the program can allow me to put chinese on there. when i ran it, everything was fine.
but when i went into regional setting again, only this time, i go under regional option tap, and change the locale to chinese, and the program wont display right anymore!! every character shows up as jibrish.(all the characters are in a resource only dll) This only happens if i set locale to chinese, any other locale setting works .

help thanx