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'''Visual DataFlex''' is a [[programming language]] by [[Data Access (company)|Data Access]], targeted at creating [[database]] and client-server type programs.
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The Visual DataFlex language differentiates itself from earlier DOS DataFlex application language in the following ways:
== Architecture ==
==Official Website==
Visual DataFlex has a 3-layer architecture:
*[http://www.VisualDataFlex.com/ Visual DataFlex Information Center] website
==Download Visual DataFlex Studio== ▼*[http://www.visualdataflex.com/download.asp?pageid=845/ Visual DataFlex Studio Download] website
;Bottom layer: Tables at this level represent customer information. Data dictionaries for each table define the rules for saving, editing, deleting, or finding a customer.
*Visual Studio for windows and web applications since revision 5 (v12+ currently).
*Personal Edition Visual DataFlex takes VDF to the freeware market starting in revision 12.
;Middle layer: Tables at this level represent orders to customers. A ''Data Dictionary Connectivity Object Tree'' defines how tables relate to each other, and ensures that all business rules of the connected tables are in force and validate.
*Database Builder(TM) creates classes for each database table, then links them together as instantiated objects in project modules for data entry, reporting, batch processing, etc.
*Easy switch between database backends, no code change needed, but SQL can be coded if desired.
;Top layer: A graphical interface ([[GUI]]) that allows users to enter, find, create, modify, or delete data.
*Inclusion of Electos(TM) Dynamic Content Publishing Website System.
*Flexibility; full oops foundation augmentable at the object level.
*Able to run on most modern platforms without requiring "power user" hardware to run on.
*Automatic delegation of messages in the [[object-oriented programming]] environment
*Embedded Database access is [[ISAM]] based. Can be used royalty free.
==External links==
*[http://www.dataaccessvisualdataflex.com/ DataOfficial Access Worldwidewebsite] website
*[http://www.mertechdata.com/ Mertech Data Systems] website - ISDBC - ISAM to SQL Database Connectivity Drivers
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*[http://www.vdf-guidance.com/ VDF-Guidance]: DataFlex programming language resources.
*[http://www.dataflex.it/ DataFlex Services] website
[[Category:4GL]]
*[news://news.dataaccess.com/ Dataflex Newsgroups]
[[Category:Domain-specific programming languages]]
*[http://www.disd.ws/ DataFlex International Software Developers] website
*[http://www.ddug.org/ DataFlex Developers & Users Group (Australia)] website
▲==Download [[ms:Visual DataFlex Studio==]]
*[http://www.NEDataFlex.Com/ NorthEast DataFlex Consortium (NEDC USA) Users Group And Team Programming] website
[[ru:Visual DataFlex]]
*[http://www.flexodbc.com/ FlexODBC Driver for DataFlex data] website
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