目录序1 环境变量法2 脚本编写3 ALIAS命令创建别名4 函数定义序 在linux系统中，自定义一条命令可以通过脚本编写、alias命令创建别名、函数定义等方式实现。
As a relative newcomer to 开发者_运维问答MFC, I see Device Contexts (DCs) a lot. I vaguely understand that it\'s something to do with drawing, but the specifics are not very well explained anywhere th
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