vs2012 error c4996: This function or variable may be unsafe

1>------ 已启动生成: 项目: 20130925, 配置: Debug Win32 ------
1>  stdafx.cpp
1>d:/code/20130925/20130925/stdafx.cpp(18): error C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1>          d:/vs2012/vc/include/stdio.h(218) : 参见“fopen”的声明
1>  20130925.cpp
1>  正在生成代码...
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