Returns the unique identifier of the pointing device that generated the event represented by the receiver.
Original signature is '- (unsigned long long)uniqueID'
Available in Mac OS X v10.4 and later.

C# | Visual Basic | Visual C++ |
public virtual ulong UniqueID { get; }
Public Overridable ReadOnly Property UniqueID As ULong Get
public: virtual property unsigned long long UniqueID { unsigned long long get (); }

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