OK, I can't seem to find out the correct way to release a complex
flippnig surface. "Insde DirectX" says that complex surfaces are
created and released with one call for all attached surfaces. I look
at the flip2D example in the DirectX samples, and they call release
for both the back page and the primary page, even though they are both
created with a single call to CreateSurface.
Which way is correct??