K 10 svn:author V 3 alc K 8 svn:date V 27 2012-10-12T03:09:59.178542Z K 7 svn:log V 204 MFC r241155 Update some of the comments. In particular, use "sleep" in preference to "block" where appropriate. Eliminate some unnecessary casts. Make a few whitespace changes for consistency. END