XLL+ version 6 supports Unicode (16-bit) character sets as well as ANSI (8-bit) character sets.
You can use Unicode characters in the XLL+ wizards, for any descriptive text, including the help text that will appear in the Excel Formula Wizard.
The XLL+ libraries now support Unicode builds as well as standard builds, and all library functions are now available in both Unicode and ANSI versions.
XLL+ 6 fully supports Unicode builds, so that you can properly use Unicode character sets in your functions' categories, descriptions and help.
The error messages produced by the XLL+ run-time libraries are now localizable, so that they can appear in the language of the user.