窗口属性 - 它们是如何实现的？
I'm curious if there is anyone around here that has inside information on the implementation details of window properties (SetProp, GetProp, etc.) in Windows.
For instance, how are storage and lookups done?
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警告：我很久之前看过这个，所以1）我的记忆可能是错误的，2）它可能已经过时了，即使我记得正确。
当我查看时，我很确定它们是作为链接列表实现的，并且如果窗口有多个属性，则性能相当。
Warning: I looked at this a long time ago, so 1) my memory may be wrong, and 2) it may be out of date, even if I am remembering correctly.
When I looked, I'm pretty sure they were implemented as linked-lists, and performance was quite poor if you had more than a few properties for a window.