Many times we want to convert multilingual characters to Unicode. For eg.: a developer might want the unicode equivalent of a chinese charatcer like 京 in Unicode, which is 京.
Fortunately we have a lot of sites with Unicode and Hex converters:
1. For Hindi: http://www.geocities.com/matthewblackwell/hindiEditor.html (online version)
2. For Chinese: http://weber.ucsd.edu/~dkjordan/resources/unicodemaker.html (online version)
3. For Persian: http://www.hoomanb.com/Farsido/english.htm (free downloadable program)
Hope this helps!