Class, Property, Method and Related Statements
This section describes general rules on creating your own classes in VBScript. A list of class related statements is provided.
Can you create your own class with VBScript? The answer is yes.
VBScript allows you to write a class with the following rules:
- Use "Class class_name" statement to define a class.
- Property members can be defined using class-level variables.
- Property members can also be defined using "Property" procedures
- Method members can be defined using function procedures and subroutine procedures
- Class-level variables can be defined as "Private" for inside-class use only.
- Procedure can be defined as "Private" for inside-class use only.
- Initialization procedure can be defined for a new object.
- Clean up procedure can be defined for a terminating object.
Things that you need to learn for creating your own classes:
- "Class" Statement - Declares the name of a class and defines properties and methods that comprise the class.
- "Property Let" Statement - Defines a property procedure to allow values, not objects, to be assigned to a property.
- "Property Set" Statement - Defines a property procedure to allow objects, not values, to be assigned to a property.
- "Property Get" Statement - Defines a property procedure to return values or objects of a property.
- "Public" Statement - Declares variables to be used as public properties accessible inside and outside this class.
- "Private" Statement - Declares variables to be used as private variables accessible only inside this class.
- "Public" Qualifier - Declares procedures to be used as public methods accessible inside and outside this class.
- "Private" Qualifier - Declares procedures to be used private procedures accessible only inside this class.
- "Public Default" Qualifier - Declares a procedure to be the default public method accessible inside and outside this class.
- "New" Operator - Instantiates an object from the specified class.
- "Set" Statement - Assigns an object to a variable.
- "Class_Initialize" Subroutine Procedure - Initializes a new object.
- "Class_Terminate" Subroutine Procedure - Clears a terminating object.
- "Nothing" Object - Releases the object reference of stored in the variable when assigned to a variable.
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
►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
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript
WSH (Windows Script Host)
PDF Printing Version