Look into the DateTime ToString[^] method and the DateTime TryParseExact[^] methods. Although you could just pass the Date or DateTime objects as is? Chances are it is compatible. But for the record, I'm assuming you're talking VB.Net? V. (MQOTD rules and previous solutions)

The business layer defines the rules of the business. So for an accounting application you would expect to see accountancy rules being defined such as VAT rules, stock control rules etc. So yes, you would expect to see logic (rules) being defined in the business layer. One of the goals of n-tier design is that these rules should be completely encapsulated so that they can reused by other applications e.g. your company web site may use these business rules as well as your desktop application. For this reason it is common to find business rules implemented as services such WCF services in an SOA architecture.

There's various implementations, and yes, some will be compatible with .NET. Whether ASTA's implementation works with .NET 4 is something that you should ask them. From the Google result it appears that there is a COM-version. Bastard Programmer from Hell :suss: If you can't read my code, try converting it here[^]