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Ready to upgrade Visual Basic 6、0 applications to Visual

Basic、NET

Outline

This document is to use Microsoft ® Visual Basic ® developers to provide the application to

upgrade to Microsoft Visual Basic、NET remendations、

Visual Basic、NET can open the Visual Basic 6、0 projects to Visual Basic、NET upgrade its technology、 However, in most cases, the project to upgrade to Visual Basic、NET, you need to make some changes to the project、 The purpose of this document is on the design and implementation of the current Visual Basic project to provide remendations to upgrade to Visual Basic、NET only after a minimum of changes、 Where appropriate, we will use the new language structure; However, this document is not a language reference for Visual Basic、NET、 What is Visual Basic、NET?

Visual Basic、NET is the next version of Visual Basic、 Microsoft re-designed the product, rather than simply as Visual Basic 6、0 add some new features、 The new version easier than previous versions of the preparation of distributed applications, such as Web and enterprise n-tier system、 Visual Basic、NET with two new forms packages (Windows Forms and Web Forms); used to access the disconnected ADO data source for the new version; the latest model of the language, remove the traditional keyword, improved type security and advanced developers need to open a low-level structure、

These new features for the Visual Basic developer opened a new door: Use the Web Forms and ADO、NET, to rapidly develop scalable Web sites; through the inheritance, the language can be a real object-oriented programming support; Windows window body itself to support access and visual inheritance; now deploy your application as the executable files and ponents from one directory to another directory so simple、

Visual Basic、NET is now available in other languages fully integrated with Microsoft Visual Studio、NET、 You can not only use different programming language to develop application ponents, and your class can now cross-language inheritance to inherit classes written in different languages、 Using the unified debugger can now debug multiple language applications, regardless of whether they are run locally or on a remote puter、 Finally, no matter what language you use, Microsoft、

NET Framework is the Microsoft Windows ®and Internet provides a rich API、Why not 100 percent patible with Visual Basic、NET?

Visual Basic、NET can be designed to consider two options: Update to the existing code base、 NET framework to run; or build from scratch to fully leverage the platform's advantages、 To reach the customers most in need of features (such as inheritance and Threading), to provide the platform for full and unrestricted access, and to ensure the next generation of Visual Basic can access Web application, the right decision in the new platform the generation from scratch、

For example, in Windows Forms in a number of new features can be used as new controls or more properties to add to the existing code base、 However, this will put all other important functions (such as security and visual inheritance) the cost of succession to the Windows form、

Our main goals is to ensure that the Visual Basic code can be pletely and use of other languages (such as Microsoft Visual C # ™, or Microsoft Visual C + + ®) write code to work, and to Visual Basic developers easy to use、 NET Framework features without using the traditional Windows API programming tools to make work、And Visual C + + and any other mon language runtime to target the same language, Visual Basic now has the same variable type, array, user-defined types, classes and interfaces; but we have removed from the language of certain functions, For example, an array of fixed-length strings and non-zero、

Visual Basic is now a true object-oriented language; some non-intuitive and inconsistent feature has been removed from the language, such as GoSub / Return and DefInt、

The result is a Visual Basic more dynamic, it will continue to be Windows-based application that creates the best tools, and now to create the next generation of Web site to be the best tool、

Upgrade to Visual Basic、NET

Visual Basic、NET from the basic principles of the traditional Windows development to build next generation Web and n-tier applications、 Therefore, you need to upgrade the code to use the advantages of Visual Basic、NET、Open in Visual Basic、NET in Visual Basic 6、0 project, it will automatically appear, "Upgrade Wizard" to guide you through the upgrade process, and automatically create a new Visual Basic、NET project (your existing project will not change)、 This is a one-way process; in Visual Basic 6、0 can not open a new Visual Basic、NET project、