2007-12-17 めも http://ufcpp.net/study/csharp/sp_thread.html http://www.stackasterisk.jp/tech/dotNet/csharp07_02.jsp http://www.atmarkit.co.jp/fdotnet/dotnettips/436bgworker/bgworker.html http://ameblo.jp/ameblo-prue http://www.u-gakugei.ac.jp/~miyadera/LECTURE/ElecBook2/ptech09.htm