Draw the underline only underneath words, not underneath whitespace.
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
public static readonly NSUInteger NSUnderlineByWordMask
Public Shared ReadOnly NSUnderlineByWordMask As NSUInteger
public: static initonly NSUInteger NSUnderlineByWordMask

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)