title: how to import a language (for messages comments e.g. persians) in C language
body: <p>1  -  i'm work with some devices for transaction data - Card and Card Readers
  one of them executes in C language, and I should put some messages and comments into options with native language (Persian language) but I don't know How can I Do it!
  Should I import a specific header file ?
  Thank you</p>
  
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  <p>2   -   unfortunately C languages in these devices are limited when modify and save into unicode, doesn't work and show unknown characters ! also I can't use images for option.</p>