[ephemient]

As said above, it's only Win32 that's broken. NT filenames (e.g. \\?\...) aren't limited by MAX_PATH.

[rbanffy]

How well documented is the NT kernel APIs? I remember reading the documentation is a little sparse (no first-hand experience)

[btn]

These aren't kernel APIs. In most cases, you can simply call the Unicode version of the same functions and prepend "\\?\".