By Jake Sturm
UML (Unified Modeling Language) is a strong notational method of object-oriented research, layout and implementation. If you know and will make the most of UML, your object-oriented visible simple programming turns into even more logical and potent. UML enables you to layout, plan and enforce nice visible simple courses. the convenience of studying the basics of visible uncomplicated usually misleads VB programmers - there's a universal misperception that potent VB courses might be in-built an ad-hoc style, with no considering via the complete ramifications of the courses being created. Object-oriented programming, and UML particularly, empowers VB programmers with a method of considering, designing and imposing their courses in a extra expert, strong demeanour. UML is a path to profitable VB programming. This initiative began with the Wrox ebook, "Beginning VB5/6 Objects", which brought the object-oriented technique itself. Now, VB6 UML takes that initiative a level additional, to extra specialist layout and implemention. simply because UML abstracts the layout strategy, it additionally permits programmers to work out many of the summary styles that ensue after they are programming. This extra summary view, and a few of the emergent styles that come into view, will let VB programmers to know their primary programming actions at an incredible and basic point.
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Extra info for VB6 UML Design and Development
If you want to learn how to build Visual Basic Enterprise solutions in a rational, sane way, with a high probability of success, then this book is for you. UML: The Key to Success You may well be beginning to form a vague idea of how UML can help with our projects, but you may also be wondering how other areas of project management tie in with using UML. There is a remarkably strong connection between UML and project management - please consider these three points: A successful object-oriented Visual Basic project is built on a foundation of good project management The foundation of good project management is thoroughly designing your project The foundation for good object-oriented design is UML We shall discuss the concept of project management in detail in the next chapter.
Use cases can also be associated with business rules, which explain special rules, related to the use case. Let's take an example. In an order entry application, the use cases could include descriptions of various subparts of the system. These sub-parts, that together could make up the whole system, could be such things such as Taking an Order, Creating a New Customer, etc. For the use case Create New Customer, there could be a verbal description of the process of creating a new customer that looked as follows: 12 Introducing the Unified Modelling Language USE CASE: CREATE NEW CUSTOMER Overview The main purpose of this use case is to create a new Customer Primary Actor Sales Representative Secondary Actor None Starting Point The use case starts when the actor makes a request to create a new Customer End Point The actor's request to create a Customer is either completed or cancelled Flow of Events The actor is prompted to enter information that defines the Customer, such as Name, Address, etc.
In the next chapter, I will lay the foundation you need to understand the book's project by giving you grounding in good project management and good Visual Basic programming techniques. As you may have a limited amount of experience with the wide range of BackOffice products and Visual Basic programming techniques needed to build this project, I will also show you everything you need to know about programming a three-tier Visual Basic project - from RDS (Remote Data Services) to ADO (ActiveX Data Objects) and MTS (Microsoft Transaction Server).
VB6 UML Design and Development by Jake Sturm