buffer before trying to recv() from the pipe.

child.

original riched20.dll.

old_end < start < end < old_start.
Reset EF_UPDATE flag after we've sent the update.

using a heuristic based on mouse and expose events.

existing 'A' versions with calls to the 'W' versions.

ANIMATE_DrawFrame shouldn't worry about locking, the lock should be
held by the caller.

work right anyway.

URL_IS_OPAQUE results depend only on the scheme, not on the URL.
URL_IS_FILEURL also only depends on the scheme ("file:").