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Use Foundation Classes?
Message
From
23/01/2000 12:36:53
 
General information
Forum:
Visual FoxPro
Category:
Classes - VCX
Miscellaneous
Thread ID:
00321400
Message ID:
00321418
Views:
33
>>[Note that while this kind of abstract layer is highly recommended when you >work with VFP base classes or most other simple classes, you need to be very >careful before deciding to do this with any composite class (eg, Password >Dialog box). Drew Speedie wrote a good article a year or so ago about dangers >in composite development. I would recommend avoiding subclassing of composites >where posssible, or at least asking questions here before doing so.]
>
>Randy,
>
>Thanks for the recommendation. Can you give me a brief description and a few more examples of a composite class and why the warning about subclassing the composite class types? Or can you tell me where to find the article from Drew Speedie?
>
I think it was FoxPro Advisor, February 1998. The basic issue has to do with inheritance of the individual components when you subclass a composite class. Maybe if you search on "speedie composite" back in that time frame there might be some good discussion of it here. Complex issue.

-- Randy
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