SWT StyledText and unicode support

I need 开发者_开发知识库to display a set of strings which contains characters from GB18030 set in a SWT StyledText field.

Most of the them got displayed correctly but some of them are displayed like boxes.

Is this because I am support to install certain font that support GB18030 character set? If so, what font should I have installed?

Or should I create a font that can support GB18030 character set? If so, what font should I use?

Thanks.