Microsoft's Visual Basic Scripting Edition (VBScript), a subset of Visual Basic for Applications, is a powerful language for Internet application development, where it can serve as a scripting language for server-side, client-side, and system scripting. Based on the book "VBScript in a Nutshell", this text details every VBScript language element - every statement, function, and object - both in VBScript itself, and in the Microsoft Scripting Runtime Library. There's a special emphasis on the following details: the syntax, using standard code conventions; the arguments accepted by the function or procedure, if any exist; and the data returned by a function. Entries are arranged alphabetically by topic, so that you can, for instance, easily find details about that string-handling function that you can't quite remember. In addition, appendixes list VBScript operators and VBScript intrinsic constants.