Self flashing windows

Self flashing? The diagram provided by David Valley lack a drip cap.

This is being talked about in several places.;f=4;t=007539

Last but not least!

I would like to know why the 2002 IRC with North Carolina ammendments code R703.8 (1.) states “except that self-flashing windows having a continuous lap of not less than 1 1/8” over the sheathing…’

What fdoes that mean?