[fpc-pascal] IFPObserved

Xiangrong Fang xrfang at gmail.com
Wed Sep 11 08:02:27 CEST 2013


Hi All,

Where can I find detailed documentation on IFPObserved?  This page only
defines the interface but not telling about the purpose of this interface:

http://www.freepascal.org/docs-html/rtl/classes/ifpobserved.html

My questions are:

- what is this interface for?
- any example on when and why to use it?
- Where can I find documentation that contains explanation on the above 2
questions, so that I can get a "big picture"? For example, if there are any
similar interfaces that form the foundation of FCL or LCL?

thanks!
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