Open file error when filename contains particular characters

In windows platform, when i try to open a file when the filename contains uncommon chars, such as ’ (different than ' ), the call to OpenFile returns false.

The filename is a wchar_t* , and I've tried any flavour of conversion to char* using WideCharToMultiByte, with no success.

Any hint?

Does the toolkit (5.5.0) support extended character set ?