Apple UTF-16 -> Unicode

[OS923]

From Wikipedia:

File and folder names in HFS Plus are also character encoded in UTF-16 and normalized to a form very nearly the same as Unicode Normalization Form D (NFD).

How can I convert this to Unicode?

[OS923]

I'll ask it this way: does someone have a source code example that draws a Unicode filename on screen?

[OS923]

Text encoding base = kTextEncodingUnicodeV2_0
Text encoding variant = kUnicodeCanonicalDecompVariant
Text encoding format = kUnicode16BitFormat