【正文】 樣，用 Visual 和 Visual Basic 編寫的應(yīng)用程序也可以安裝在同一臺(tái)計(jì)算機(jī)上并同時(shí)執(zhí)行。升級(jí)后，可能還需要改變您的應(yīng)用程序以利用 Visual 的某些新功能。這是單向過程；在 Visual Basic 中不能打開新的 Visual 工程。 其結(jié)果是使 Visual Basic 更具活力，它將繼續(xù)成為創(chuàng)建基于 Windows 的應(yīng)用程序的最佳工具，并且現(xiàn)在要成為創(chuàng)建下一代 Web 站點(diǎn)的最佳工具。 我們的主要目標(biāo)之一就是確保 Visual Basic 代碼能完全與用其他語言（例如 Microsoft Visual C? 或 Microsoft Visual C++174。 為什么 Visual 不能百分之百兼容？ 設(shè)計(jì) Visual 時(shí)可以考慮兩種選擇：更新現(xiàn)有代碼的基礎(chǔ)以便在 .NET 框架上運(yùn)行；或者從頭開始生成，充分利用平臺(tái)的優(yōu)點(diǎn)。您不僅可以用不同的編程語言開發(fā)應(yīng)用程序組件，而且您的類現(xiàn)在可以通過跨語言繼承性來繼承用不同語言編寫的類。新版本比以前的版本更易于編寫分布式應(yīng)用程序 ，如 Web 和企業(yè) n層系統(tǒng)。本文檔 的目的是就設(shè)計(jì)和實(shí)現(xiàn)當(dāng)前 Visual Basic 工程提供建議，以便升級(jí)到 Visual 后只需進(jìn)行最少的修改。 Visual Basic174。 but the custom attribute tags to set up and assign shortcut keys will not upgrade. Single application Visual Basic supports the following types of singlegeneration applications: * Singledatabase application Active Server Pages (ASP) Visual introduces an enhanced version that is ASP , and with the Web form to the architecture, Web form is the case with Visual Basic HTML page. Architecture is based on the server. The following remendations and a list of the main architecture proposed for the development of browserbased Visual Basic applications to enable them to seamlessly migrate to Visual projects: Remend that you follow Microsoft guidelines for multitier architecture to create your application, using ASP to create interfaces using Visual Basic or Visual C + + COM object to create business logic. Visual in full support of ASP, you can use ASP, and Web Forms applications to continue to expand. Visual Basic and Visual C + + business objects can not be modified or upgraded to for Visual or Visual . DHTML applications, including DHTML page and the client DLL. These applications are not automatically upgraded to Visual . We remend that you leave these applications in the Visual Basic . Visual does not support ActiveX documents, the same as the DHTML project does not automatically update. We remend you to stay in the ActiveX document application in Visual Basic , or possible, to replace the ActiveX user control documents. Visual Basic ActiveX documents and DHTML applications with Visual technology work together. For example, you can navigate from a Visual Web Forms to Visual Basic DHTML page, and vice versa. Visual is no longer a Webclass. Webclass application will be upgraded to , but after the upgrade you need to make some modifications. Webclass existing applications with Visual Web Forms and ASP applications work together, but for new projects, we remend that you use with Visual Basic business object ASP39。 to create a browserbased Inter and Intra applications provide the following types of technologies: some nonintuitive 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 Windowsbased application that creates the best tools, and now to create the next generation of Web site to be the best tool. Upgrade to Visual Visual from the basic principles of the traditional Windows development to build next generation Web and ntier applications. Therefore, you need to upgrade the code to use the advantages of Visual . Open in Visual in Visual Basic project, it will automatically appear, Upgrade Wizard to guide you through the upgrade process, and automatically create a new Visual project (your existing project will not change). This is a oneway process。 or build from scratch to fully leverage the platform39。 through the inheritance, the language can be a real objectoriented programming support。 developers to provide the application to upgrade to Microsoft Visual remendations. Visual can open the Visual Basic projects to Visual upgrade its technology. However, in most cases, the project to upgrade to Visual , 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 only after a minimum of changes. Where appropriate, we will use the new language structure。 Visual Basic 174。 the latest model of the language, remove the traditional keyword, improved type security and advanced developers need to open a lowlevel structure. These new features for the Visual Basic developer opened a new door: Use the Web Forms and , to rapidly develop scalable Web sites。 and Inter provides a rich API. Why not 100 percent patible with Visual ? Visual can be designed to consider two options: Update to the existing code base. NET framework to run。 but we have removed from the language of certain functions, For example, an array of fixedlength strings and nonzero. Visual Basic is now a true objectoriented language。 controls), pile and save the project, and then upgrade the project to Visual . Visual and Visual Basic can be installed on the same puter and run. Similarly, with Visual and Visual Basic applications written can also be installed on the same puter and run concurrently. Components written using Visual with earlier versions of Visual Basic, and COM ponents written in other languages to work together. For example, can be written using Visual Basic ActiveX controls to Visual Windows Forms drag and drop, use Visual Class Library in Visual Basic COM objects, or to Visual Basic executable file to the Visual Library. Components with Visual piler and piled using Visual Basic runtime ponents are slightly different.