You can use MSDN subscriptions for development and testing (testing is part of the development process), but not for production.

>We already have MSDN subscription but I thought we couldn't use them to develop software, only for testing purposes. Are we allowed to use MSDN to develop and to put into production?
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>>You may want to look at volume pricing. It could save you money. Also, a purchase of an MSDN subscription could be more cost effective over separate VFP 7.0 and VS .NET.
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>>>I'm working with 6 licences of Visual Studio 6, How can we upgrade or purchase the upgrade of VFP7?
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>>>We intend to go go to Visual studio (Dot Net) later on.