Download e-book for iPad: VBScript in a Nutshell, 2nd Edition by Paul Lomax

By Paul Lomax

ISBN-10: 0596004885

ISBN-13: 9780596004880

Light-weight but strong, VBScript from Microsoft is utilized in 4 major components: server-side internet purposes utilizing lively Server Pages (ASP), client-side net scripts utilizing web Explorer, code at the back of Outlook kinds, and the automation of repetitive initiatives utilizing home windows Script Host (WSH). VBScript in a Nutshell, moment version, provides present and whole documentation for programmers and method directors who are looking to boost potent scripts in all 4 components. thoroughly up-to-date for VBScript 5.6, WSH 5.6, and ASP 3.0, VBScript in a Nutshell, moment variation comprises introductory chapters to help you preserve present with the numerous adjustments because the first version was once released. a brand new bankruptcy introduces the home windows Script part for developing binary COM elements, and an appendix records the Script Encoder. the most a part of the booklet is a entire alphabetical connection with the VBScript language and the Scripting Runtime Library. despite your point of expertise programming with VBScript, VBScript in a Nutshell, moment version, is the publication you will want through your facet - the main entire, up to date, and easy-to-use language reference to be had.

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Additional info for VBScript in a Nutshell, 2nd Edition

Example text

2658 vResult = vVar1 + vVar2 %> The result of adding <%=vVar1 %> and <%=vVar2 %> is <%=vResult %>. When the user requests the ASP page, its script executes. It begins by using the Dim statement to declare three variables. Next, it assigns the integer value 1 to the first variable, vVar1, and to the third variable, vResult. 2658, to the second variable, vVar2. Then the routine adds the two variables together and stores their result to the integer variable vResult. As you may recall from the overview of data types, the value assigned to an integer cannot exceed 32,767, nor can it include any digits to the left of the decimal.

Enter a value into the input box and check the result. Example 3-4. A typo in a variable name Dim tstVar1 tstVar1 = InputBox("Enter a value") MsgBox testVar1 Interesting result, isn't it? No matter what you type into the input box, the message box is always blank. Now in this small script, it's pretty noticeable that we misspelled the name of the variable, and that VBScript treats tstVar1 and testVar1 as two different variables altogether. However, more complicated scripts won't bear out this error so easily.

Table 3-1 lists the possible values returned by VarType and the data types that they represent. 3 later in this chapter. Table 3-1. The values returned by the VarType function Data Constant type 0 Empty vbEmpty 1 Null vbNull 2 Integer vbInteger 3 Long vbLong 4 Single vbSingle 5 Double vbDouble 6 Currency vbCurrency 7 Date vbDate 8 String vbString 9 Object vbObject 10 Error vbError 11 Boolean vbBoolean Array of 12 vbVariant Variant 17 Byte vbByte 8192 Array vbArray Before we see how you use VarType within a script, we should quickly note the value returned by VarType if it detects an array.

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