The kernel thread and the application thread will handshake with each other.
内核线程和应用程序线程需要相互进行握手。
When called by the application, the plug-in serializer runs in the same thread as the application and can only access elements created within the application thread.
应用程序调用插件序列化程序时，插件序列化程序与应用程序在同一线程中运行，且仅能访问应用程序线程中创建的元素。
The application thread is only initialized for com interop if the thread actually makes a call to a com component.
如果应用程序线程实际调用了COM组件，则仅为COM互操作初始化该线程。
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