宏定义

http://www.cnblogs.com/haore147/p/3646934.html


http://blog.csdn.net/yitailong/article/details/8243803


http://zhidao.baidu.com/link?url=hV5Pn0Nm7PZfwfzFGaUGoAh9egIKlkyz-V6X5t55EuiPBGcfb9gk9SJu_sgWCmM3ZrDkxjlTirWAYjfvqXv4Yq


http://www.eefocus.com/wwm_sky/blog/12-09/285678_e8b26.html