UTF-8 format

[rijnahts]

HI,
   I am very new to ICU. As a part of my work i need to store data in UTF8 format. But i have one question here. As a part of my implementation in linux i will be using the DOM Parser to read the xml file, and parser provides the ouput strings as wchar32 types.  As linux supports wchar_t as 32 bit wide, the wide characters uses the UFT32 encoding.

Does ICU provides the API to convert wchart_t (32 bit) into UTF-8 format.

Thanks for help in advance....