>> Not a bad idea. Maybe an april1 release that
reverses all the 
>> pixels?

Yea, but that's no joke, it is actually a useful
function.  I've long wanted something like this
settable in BitBlt (or wherever) to easily toggle
between day/night mode.  Eventually I did it the
"hard" way with "inverteBright" which is tons of code
and far from ideal..