vm

http://blog.csdn.net/b_h_l/article/details/39078831

http://blog.csdn.net/bekilledlzy/article/details/1765802

http://cppblog.com/merlinfang/archive/2007/06/26/27025.html

http://www.cnblogs.com/journeyonmyway/archive/2011/07/12/2104522.html

-- virtualbox --

https://stackoverflow.com/questions/7499985/detect-if-application-running-on-virtual-box?rq=1