Visual basic 6 the complete reference

Download Visual basic 6 the complete reference

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<ul><li> 1. Introduction MCSD Training Guide: Visual Basic 6 Exams is designed for developers with the goal of certication as a Microsoft Certied Solutions Developer (MCSD). It covers both the Designing and Implementing Distributed Applications with Microsoft Visual Basic 6.0 exam (70-175) and the Designing and Implementing Desktop Applications with Microsoft Visual Basic 6.0 exam (70-176). These exams measure your ability to design and implement distributed and desktop application solutions by using Microsoft Visual Basic version 6.0. This book is your one-stop shop. Everything you need to know to pass the exams is in here, and Microsoft has approved it as study material. You do not have to take a class in addition to buying this book to pass the exam. However, depending on your personal study habits or learning style, you may benet from buying this book and taking a class. This book also can help advanced users and administra- tors who are not studying for the exam but are looking for a single-volume reference on Microsofts TCP/IP implementation. HOW THIS BOOK HELPS YOU This book conducts you on a self-guided tour of all the areas covered by the VB6 Distributed Applications exam and the VB6 Desktop Applications exam and teaches you the specic skills you need to achieve your MCSD certication. Youll also nd helpful hints, tips, real-world examples, exercises, and references to addi- tional study materials. Specically, this book is set up to help you in the following ways: Organization. This book is organized by individual exam objectives. Every objective you need to know for the VB6 Distributed Applications exam and the VB6 Desktop Applications exam is covered in this book. The objectives are not covered in exactly the same order as they are listed by Microsoft, but we have attempted to organize the topics in the most logical and accessible fashion to make it as easy as possible for you to learn the information. We have also attempted to make the information accessible in the following ways: The full list of exam topics and objectives is included in this introduction. Each chapter begins with a list of the objectives to be covered. Each objective is also identied as one that applies to the Distributed Applications exam, the Desktop Applications exam, or both. Each chapter also begins with an outline that pro- vides you with an overview of the material and the page numbers where particular topics can be found. We also repeat objectives before where the mater- ial most directly relevant to it is covered (unless the whole chapter addresses a single objective). Information on where the objectives are covered is also conveniently condensed on the tear card at the front of this book. Instructional Features. This book has been designed to provide you with multiple ways to learn and rein- force the exam material. Following are some of the helpful methods: 02 002-8 Intro 3/1/99 7:45 AM Page 1 </li></ul><p> 2. 2 MCSD TRAINING GUIDE: VISUAL BASIC 6 EXAMS Objective Explanations. As mentioned previ- ously, each chapter begins with a list of the objectives covered in the chapter. In addition, immediately following each objective is an explanation in a context that denes it more meaningfully. Study Strategies. The beginning of the chapter also includes strategies for approaching the studying and retaining of the material in the chapter, particularly as it is addressed on the exam. Exam Tips. Exam tips appear in the margin to provide specic exam-related advice. Such tips may address what material is covered (or not covered) on the exam, how it is covered, mnemonic devices, or particular quirks of that exam. Review Breaks and Summaries. Crucial infor- mation is summarized at various points in the book in lists or tables. Each chapter ends with a summary as well. Key Terms. A list of key terms appears at the end of each chapter. Notes. These appear in the margin and contain various kinds of useful information such as tips on technology or administrative practices, historical background on terms and technolo- gies, or side commentary on industry issues. Warnings. When using sophisticated informa- tion technology, there is always the potential for mistakes or even catastrophes that occur because of improper application of the tech- nology. Warnings appear in the margin to alert you to such potential problems. In-depths. These more extensive discussions cover material that may not be directly relevant to the exam but which is useful as reference material or in everyday practice. In-depths may also provide useful background or contextual information necessary for understanding the larger topic under consideration. Step by Steps. These are hands-on, tutorial instructions that lead you through a particular task or function relevant to the exam objectives. Exercises. Found at the end of the chapters in the Apply Your Knowledge section, exercises may include additional tutorial material as well as other types of problems and questions. Case Studies. Presented throughout the book, case studies provide you with a more concep- tual opportunity to apply and reinforce the knowledge you are developing. They include a description of a scenario, the essence of the case, and an extended analysis section. They also reect the real-world experiences of the authors in ways that prepare you not only for the exam but for actual network administra- tion as well. Extensive practice test options. The book pro- vides numerous opportunities for you to assess your knowledge and practice for the exam. The practice options include the following: Review Questions. These open-ended questions appear in the Apply Your Knowledge section at the end of each chapter. They allow you to quickly assess your comprehension of what you just read in the chapter. Answers to the questions are provided later in the section. 02 002-8 Intro 3/1/99 7:45 AM Page 2 3. INTRODUCTION 3 Exam Questions. These questions also appear in the Apply your Knowledge section. They reect the kinds of multiple-choice questions that appear on the Microsoft exams. Use them to practice for the exam and to help you determine what you know and what you need to review or study further. Answers and explanations for them are provided. Practice Exam. A Practice Exam is included in the Final Review section. The Final Review section and the Practice Exam are discussed below. Top Score. The Top Score software included on the CD-ROM provides further practice questions. It also provides you with valuable exam-day tips and information on new exam/question formats such as adaptive tests and simulation- based questions. Practice Exam. A full practice test for each of the exams is included. Questions are written in the styles used on the actual exams. Use it to assess your readiness for the real thing. The book includes several valuable appendices as well, including a glossary (Appendix A), an overview of the Microsoft certication program (Appendix B), and a description of what is on the CD-ROM (Appendix C). The Microsoft VB exams assume an elementary knowl- edge of VB but do not specify this knowledge in the exam objectives. For that reason, this book includes Appendix E, Visual Basic Basics that provides you with an overview of the elementary VB knowledge and skills that are not specied as objectives but that you will need to know in order to pass the exam. Finally, Appendix F provides you with a list of Suggested Readings and Resources that provides you with useful information on Visual Basic 6. These and all the other book features mentioned previ- ously will provide you with thorough preparation for the exam. For more information about the exam or the certica- tion process, contact Microsoft: Microsoft Education: 800-636-7544 Internet: ftp://ftp.microsoft.com/Services/MSEdCert World Wide Web: http://www.microsoft.com/train_cert CompuServe Forum: GO MSEDCERT NOTE For a complete description of the New Riders Top Score test engine, please see Appendix D, Using the Top Score Software. Final Review. This part of the book provides you with three valuable tools for preparing for the exam. Fast Facts. This condensed version of the information contained in the book will prove extremely useful for last-minute review. Study and Exam Tips. Read this section early on to help you develop study strategies. 02 002-8 Intro 3/1/99 7:46 AM Page 3 4. 4 MCSD TRAINING GUIDE: VISUAL BASIC 6 EXAMS WHAT THE DESIGNING AND IMPLEMENTING DISTRIBUTED APPLICATIONS WITH MICROSOFT VISUAL BASIC 6.0 EXAM (70-175) COVERS The Designing and Implementing Distributed Applications with Microsoft Visual Basic 6.0 Exam (70-175) covers the nine main topic areas represented by the conceptual groupings of the test objectives: Developing the Conceptual and Logical Design, Deriving the Physical Design, Establishing the Development Environment, Creating User Services, Creating and Managing COM Components, Creating Data Services, Testing the Solution, Deploying the Application, and Maintaining and Supporting an Application. Each of these main topic areas is covered in one or more chapters. The exam objectives are listed by topic area in the following sections. Developing the Conceptual and Logical Design Given a conceptual design, apply the principles of modular design to derive the components and services of the logical design. Deriving the Physical Design Assess the potential impact of the logical design on per- formance, maintainability, extensibility, scalability, availability, and security. Design Visual Basic components to access data from a database in a multitier application. Design the properties, methods, and events of components. Establishing the Development Environment Establish the environment for source-code version control. Install and congure Visual Basic for developing distributed applications. Congure a server computer to run Microsoft Transaction Server (MTS). Install MTS. Set up security on a system package. Congure a client computer to use an MTS component. Create packages that install or update MTS components on a client computer. Creating User Services Implement navigational design. Dynamically modify the appearance of a menu. Add a pop-up menu to an application. Create an application that adds and deletes menus at runtime. Add controls to forms. Set properties for controls. Assign code to a control to respond to an event. 02 002-8 Intro 3/1/99 7:46 AM Page 4 5. INTRODUCTION 5 Create data input forms and dialog boxes. Display and manipulate data by using custom controls. Controls include TreeView, ListView, ImageList, Toolbar, and StatusBar. Create an application that adds and deletes controls at runtime. Use the Controls collection to manipulate controls at runtime. Use the Forms collection to manipulate forms at runtime. Write code that validates user input. Create an application that veries data entered at the eld level and the form level by a user. Create an application that enables or disables controls based on input in elds. Write code that processes data entered on a form. Given a scenario, add code to the appropriate form event. Events include Initialize, Terminate, Load, Unload, QueryUnload, Activate, and DeActivate. Add an ActiveX control to the toolbox. Create dynamic Web pages by using Active Server Pages (ASP) and Web classes. Create a Web page by using the DHTML Page Designer to dynamically change attributes of elements, change content, change styles, and position elements. Use data binding to display and manipulate data from a data source. Instantiate and invoke a COM component. Create a Visual Basic client application that uses a COM component. Create a Visual Basic application that handles events from a COM component. Create callback procedures to enable asynchronous pro- cessing between COM components and Visual Basic client applications. Implement online user assistance in a distributed appli- cation. Set appropriate properties to enable user assis- tance. Help properties include HelpFile, HelpContextID, and WhatsThisHelp. Create HTML Help for an application. Implement messages from a server component to a user interface. Implement error handling for the user interface in dis- tributed applications. Identify and trap runtime errors. Handle inline errors. Determine how to send error information from a COM component to a client computer. Use an active document to present information within a Web browser. Creating and Managing COM Components Create a COM component that implements business rules or logic. Components include DLLs, ActiveX controls, and active documents. Create ActiveX controls. Create an ActiveX control that exposes properties. Use control events to save and load persistent properties. 02 002-8 Intro 3/1/99 7:46 AM Page 5 6. 6 MCSD TRAINING GUIDE: VISUAL BASIC 6 EXAMS Test and debug an ActiveX control. Create and enable property pages for an ActiveX control. Enable the data-binding capabilities of an ActiveX control. Create an ActiveX control that is a data source. Create an active document. Use code within an active document to interact with a container application. Navigate to other active documents. Design and create components that will be used with MTS. Debug Visual Basic code that uses objects from a COM component. Choose the appropriate threading model for a COM component. Create a package by using the MTS Explorer. Use the Package and Deployment Wizard to create a package. Import existing packages. Assign names to packages. Assign security to packages. Add components to an MTS package. Set transactional properties of components. Set security properties of components. Use role-based security to limit use of an MTS package to specic users. Create roles. Assign roles to components or component interfaces. Add users to roles. Compile a project with class modules into a COM component. Implement an object model within a COM component. Set properties to control the instancing of a class within a COM component. Use Visual Component Manager to manage components. Register and unregister a COM component. Creating Data Services Access and manipulate a data source by using ADO and the ADO Data control. Access and manipulate data by using the Execute Direct model. Access and manipulate data by using the Prepare/Execute model. Access and manipulate data by using the Stored Procedures model. Use a stored procedure to execute a statement on a database. Use a stored procedure to return records to a Visual Basic application. Retrieve and manipulate data by using different cursor locations. Cursor locations include client-side and server- side. Retrieve and manipulate data by using different cursor types. Cursor types include forward-only, static, dynamic, and keyset. Use the ADO Errors collection to handle database errors. 02 002-8 Intro 3/1/99 7:46 AM Page 6 7. INTRODUCTION 7 Manage database transactions to ensure data consis- tency and recoverabili...</p>