Curse you, DWT Cursors!

[Bill Baxter]

As far as I can tell SWT (and therefore DWT) Cursors do not support 
alpha masks (only 1-bit masks).  They also don't have any official way 
to do an end run around the API and use native calls if desired.

Fortunately the bits of state needed to work around it are public (the 
default constructor and access to the .handle property), though 
unintentionally so, it seems.

--bb