全局钩子hook，可以方便的屏蔽掉系统消息。包括一些低级的组合键消息例如alt+tab。压缩包里包括一个hook动态库，一个测试工具。-The global hook hook can be easily masked system message. Including some lower combination key messages such alt+tab. Compressed bundle includes a hook dynamic library, a testing tool.