VBScript Tutorials - Herong's Tutorial Examples - v6.02, by Herong Yang
Built-in "Err" Object Properties and Methods
This section describes the built-in 'Err' object, and its properties and methods, Err.Number, Err.Description, Err.Source, Err.Raise(), Err.Clear().
We have used some properties and method of the "Err" object several times in our examples, now let's provide a summary about this built-in object:
1. "Err" is a built-in object representing the last runtime error that occurred during the execution.
2. "Err" has the following important properties.
3. "Err" has the following important methods.
Here is a list of commonly-occurred runtime errors pre-defined in VBScript:
Err.Number Err.Description 5 Invalid procedure call or argument 6 Overflow 7 Out of Memory 9 Subscript out of range 10 This array is fixed or temporarily locked 11 Division by zero 13 Type mismatch 14 Out of string space 17 Can't perform requested operation 28 Out of stack space 35 Sub or function not defined 48 Error in loading DLL 51 Internal error 91 Object variable not set 92 For loop not initialized 94 Invalid use of Null 424 Object required
Table of Contents
Introduction of VBScript - Visual Basic Scripting Edition
Variant Data Type, Subtypes, and Literals
Numeric Comparison Operations and Logical Operations
String Operations - Concatenation and Comparison
Variable Declaration and Assignment Statement
Expression and Order of Operation Precedence
Statement Syntax and Statement Types
Array Data Type and Related Statements
Array References and Array Assignment Statements
Conditional Statements - "If ... Then" and "Select Case"
Loop Statements - "For", "While", and "Do"
"Function" and "Sub" Procedures
Inspecting Variables Received in Procedures
►Error Handling Flag and the "Err" Object
IE Option Setting - Enable Script Debugging
"On Error Resume Next" - Turning on Error Handling
"On Error GoTo 0" - Turning off Error Handling
"Err.Number" and "Err.Clear()" - Error Code and Clear Method
►Built-in "Err" Object Properties and Methods
"Err.Raise()" - Raising Your Own Errors
Regular Expression Pattern Match and Replacement
scrrun.dll - Scripting Runtime DLL Library
IE Web Browser Supporting VBScript