Creating Your Own Classes
This chapter provides tutorial examples and notes on classes and objects. Topics include defining a new class, instantiating a new object, assigning object reference, initializing and terminating an object, defining properties with 'Public' statements and 'Property' procedures, defining methods with 'Public' qualifiers, defining the default method.
Class, Property, Method and Related Statements
"Class" Statement - Defining Your Own Class
"New" Operator and "Nothing" Object
"Public/Private" Variables and Dot Operator
"Property Let/Set/Get" Procedures
Object Methods - "Public" Procedures
"New", "Set", "Is", ".", "Nothing" - Object Operations
"StringBuffer" - A Class Example
- You can define a class in VBScript with the "Class" statement.
- The "New" operator creates a new object and returns a reference of the object.
- The "Set" statement assigns an object reference to a variable.
- The "Class_Initialize" procedure will be called when a new object is created.
- The "Nothing" object is useful, if you want to release the reference of an object in a variable.
- The "Class_Terminate" procedure will be called when the last reference of an object is released.
- "Public" statement defines simple public properties.
- "Private" statement defines private variables.
- "Property Let/Set/Get" procedures defines complex public properties.
- "Public" qualifier makes a procedure as a public method.
- "Private" qualifier keeps a procedure as a private procedure.
- "Public Default" qualifier makes a procedure as a default method.
- The default method can be called without the method name.
Table of Contents
About This Book
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
Regular Expression Pattern Match and Replacement
scrrun.dll - Scripting Runtime DLL Library
►Creating Your Own Classes
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript
WSH (Windows Script Host)
Full Version in PDF/EPUB