By Paul Lomax
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Extra resources for VBScript in nutshell
Run the script again, with the mistake still there. " We now know what we are looking for: the message tells us that we haven't declared a variable, and gives us the line number on which the error occurred. Even in a complex script, it usually takes only a couple of seconds to find and correct the bug. Using Option Explicit is good programming practice. It forces us to declare all variables and constants with Dim, and, should we make an error in the script, makes it easier to find. 6 Array Variables The types of variables we have dealt with so far have contained single values, or, to give them their correct title, are scalar variables.
3 Client-Side Scripts for MSIE Script-level code in client-side scripts is found inside tags but not inside of functions, subroutines, and classes. 3 show. In fact, script-level code can be used as a replacement for the Window_OnLoad event. 9. 3. 4 Outlook Forms Like Windows Script Host, Outlook executes all script-level code not just variable declarations when a form is loaded. In this case, script-level code corresponds closely to the Outlook form's Item_Open event procedure, which is fired when the form is opened.
Error The Error subtype is used to store an error number. Error numbers are generated automatically by VBScript, and can then be used by your error handling routine. Error handling routines are discussed in Chapter 4. 41 42 So what does all this mean to the VBScript programmer? Above all, it means simplicity: as with any well-designed system, the variant is complex, but not complicated. 1 shows. 1. 2658 vResult = vVar1 + vVar2 %> The result of adding <%=vVar1 %> and <%=vVar2 %> is <%=vResult %>.
VBScript in nutshell by Paul Lomax