>Thank You very much , For ALL
>
>I think I found a ready project, in VFP, that I´m looking for. Is avaiable for free download, and to use, in:
>
>
>http://www.tightlinecomputers.com/Downloads.htm
>
>In this site is possible download :
>Class Based Data Management as Presented by Andy Kramek at Advisor Devcon 2001
>
>In the modern business environment access to data is crucial for any application, however, there many different databases in common use. Thus a common problem is how to write an application that can access different data sources without requiring different versions (with all the concomitant maintenance issues) of the source code. The Data Classes illustrate how to implement an Application Programming Interface (API) that enables application code to be written without requiring specific references to the data store. The consequence is that a single suite of source code can access data stored in different databases as required.
>
>The attached version of the classes runs under versions of Visual FoxPro from 6.0 (SP5) or later. These classes have been placed in the Public Domain, with no warranty or guarantee of any kind, and are intended only to illustrate a methodology for accessing data. They may be used ‘as is’, or modified, providing original authorship is acknowledged, but the authors accept no responsibility for any use, nor do the authors maintain or support the Public Domain version of these classes in any way.

Hi Eduardo,

I'm not familiar with this particular example, but it sounds interesting, and I know it comes from a highly reputable source. Perhaps I misunderstood what you were looking for with respect to "persistence". In any case, I'm glad if I somehow helped you find what you were after.

Mike