Thread Synchronization with the VCL VCL多线程同步
In multi-threaded applications that need to update the user interface, you
cannot access to properties of visual components (or in memory-objects)
that are part of the global thread without a synchronization mechanism.
The VCL, in fact, in not thread-safe (as is true for most user-interface libraries).
Two threads accessing an object at the same time could compromise its
state.
在一个多线程的需要更新用户界面的应用程序中,如果没有同步机制的话,你将不能访问是全局线程的一部分的可视组件的属性(或在内存的对象)。