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?
Warning: I looked at this a long time ago, so 1) my memory may be wrong, and 2) it may be out of date, even if I am remembering correctly.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.