Hi Vlad,

We use something in between. All our validation procedures are in a table, so user can write, edit, add them on the fly. It creates a program with all validation methods, (using TextMerge approach).

Works fine, though there is a huge field for optimization. This is not my application, so I don't know all inner details...

>Hi!
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>We already tried this approach 2 years ago with constant improvement and now it work great and quickly enough. We speed it up by loading of all business rules from database at the form start. Than calling them goes very quickly, quick enough to use such code in the Valid event of the controls. It was great job. However, unfortunately, client rarely know how to program business rules that way, thus only adminisrators can use this tool, that is much similar to the pre-compiled business rules (recompiling of the applciation). No much of the benefit here. <s><s><s>
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>>If that works, with appropriate metadata and business rules layer, you could make an entirely data-driven database environment with this! It might take a little longer to load, though <s>.
>>
>> Jay