french accents in keyboard

Hi

you can see the green circle at http://www.openmobilefree.net/other/file/keyboard_problem_2.JPG

those are two accents used in French and some other languages, they can appear above any vowel (a,e,i,o,u) and sometimes even y

can someone told me what is the UNICODE of those two accents. or how to use in keyboard like those keys.
I am a Chinese never use those keys.

thanks for help

Xiangfu Liu
Email: xiangfu at qi-hardware dot com
Web: http://www.qi-hardware.com