Common Problem Areas and How to Avoid Them

There is much to be said for the old maxim, "The best way to learn is by making mistakes." Once you have made a mistake, understood what you did wrong, and rectified the error, you will in general have a much better understanding of the concepts involved and of what is needed to build a successful application. But to save you from having to experience this painful process of trial and error in its entirety, we'd like to share with you some of the most common errors that ourselves and other programmers we've worked with have made over the years. These types of errors are actually not unique to VBScript, nor in fact to VB, but to programming in general. In approximate order of frequency, they are:

  1. Syntax errors generated by typing errors. This is a tough one. Typing errors the misspelled function call or variable name are always going to creep into code somewhere. They can be difficult to detect, particularly because they are typing errors; we frequently train our eyes to see what should be there, rather than what is there. When the effect of the typing error is subtle, it becomes even more difficult to detect. For instance, in a client-side script, we had spelled LANGUAGE as LANGAUGE in coding the

    Part I: The Basics


    Program Structure

    Data Types and Variables

    Error Handling and Debugging

    VBScript with Active Server Pages

    Programming Outlook Forms

    Windows Script Host 5.6

    VBScript with Internet Explorer

    Windows Script Components

    Part II: Reference

    Part III: Appendixes

    Appendix A. Language Elements by Category

    Appendix B. VBScript Constants

    Appendix C. Operators

    Appendix E. The Script Encoder

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Vbscript in a Nutshell
VBScript in a Nutshell, 2nd Edition
ISBN: 0596004885
EAN: 2147483647
Year: 2003
Pages: 335
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