QueryInterface

http://hi.baidu.com/cxyking/blog/item/c70bd82630ee33148a82a1dd.html

COM (very good learning)

http://www.vckbase.com/vckbase/columnist/yangfeng/

A COM sample (Learning)

http://blog.chinaunix.net/u1/59687/showart_499011.html

Create COM by using MFC Wizard (Learning)

http://blog.csdn.net/scq2099yt/archive/2008/03/20/2198860.aspx

Diff btw SendMessage PostMessage

http://blog.tianya.cn/blogger/post_show.asp?BlogID=95936&PostID=5754648

MFC COM InvokeHelper (learning)

http://blog.csdn.net/feijj2002_/archive/2006/04/02/617196.aspx

Call API s in VC

http://www.china-askpro.com/msg36/qa44.shtml