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Microsoft's position on Visual FoxPro and .NET
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À
09/06/2004 22:32:54
Emmanuel Huybrechts
Technimeca International Corp.
Montréal, Québec, Canada
Information générale
Forum:
Visual FoxPro
Catégorie:
Conférences & événements
Divers
Thread ID:
00908177
Message ID:
00912073
Vues:
32
>> BTW, you said in VFPconversion.com "[...] but you can add this
>> functionality through ActiveX controls. This process works well,
>> in general, although this approach loses many capabilities such
>> as inheritance."

>> You don't loose inheritance with ActiveX controls (I always subclass
>> every ActiveX control I use), or maybe I did not understand what
>> you mean ?

You can not subclass ActiveX controls, because COM does not support inheritance. In VFP, you can subclass the container that hosts the control, but you can not subclass the control itself. For instance, you could not subclass the TreeView and change its render algorithm by overriding the appropriate methods.

Markus




Markus Egger
President, EPS Software Corp
Author, Advanced Object Oriented Programming with VFP6
Publisher, CoDe Magazine
Microsoft MVP since 1995
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