The programming overhead in mtmdi should be a warning that you should have a good reason for using a user interface thread to justify the programming cost Mtmdi中的编程系统开销是一个预兆，需有充足的理由证明编程成本的合理性，才应使用用户界面线程。
In a windows application , for example , delegating the long - running operation to a background thread allows the user interface thread to remain responsive while the operation is executing 例如，在windows应用程序中，通过将长时间运行的操作委托给后台线程，可允许用户界面线程在操作执行时保持响应状态。
Menu to compare the " feel " of recalculation in a separate worker thread versus recalculation in the same thread as the main application user interface thread 在“ demo ”菜单上单击“ worker thread ”或“ single thread ” ，对比在单独的辅助线程中重新计算与在主应用程序用户界面线程所在的同一线程中重新计算的“感受” 。
Threads are divided into worker thread and user interface thread . the worker thread has no message rotation queue and window , so it can not receive messages . it is used to perform backstage task such as computation of cpu intensive , file i / o and so on 辅助线程没有消息循环队列和窗口，所以它不能接收消息，它被用于完成后台任务，如cpu密集型的计算，文件i o等等。
