A selector is analogous to a Windows message loop, in which the selector captures the various events from different clients and dispatches them to their respective event handlers.
选择器(selector)与Windows消息循环类似，它从不同客户机捕获各种事件并将它们分派到相应的事件处理程序。
When the main message loop is closed, the application exits.
主消息循环关闭后，应用程序将退出。
Therefore, the thread that installed the hook must have a message loop.
因此，安装钩子的线程必须有消息循环。
Therefore, the thread that installed the hook must have a message loop.
因此，安装有该钩子的线程必须有消息循环。
This overload applies only to processes with a user interface and, therefore, a message loop.
此重载仅适用于具有用户界面并因此具有消息循环的进程。
An application's message loop is an internal program loop that retrieves messages from a thread's message queue, translates them, and then sends them to the application to be handled.
应用程序的消息循环是内部程序循环，它从线程的消息队列检索消息，然后转换这些消息，之后将它们发送给要处理的应用程序。
An application's message loop is an internal program loop that retrieves messages from a thread's message queue, translates them, and then sends them to the application to be handled.
应用程序的消息循环是内部程序循环，它从线程的消息队列检索消息，然后转换这些消息，之后将它们发送给要处理的应用程序。
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