Introduction QTP VbScript


o VBScript is a scripting language.
o A scripting language is a lightweight programming language.
o VBScript is a light version of Microsoft's programming language Visual Basic.

When a VBScript is inserted into a HTML document, the Internet browser will read the HTML and interpret the VBScript. The VBScript can be executed immediately, or at a later event.

Microsoft Visual Basic Scripting Edition brings active scripting to a wide variety of environments, including Web client scripting in Microsoft Internet Explorer and Web server scripting in Microsoft Internet Information Service.

1.1 Windows Script Host (WSH)

It is a Windows administration tool. WSH creates an environment for hosting scripts.

That is, when a script arrives at your computer, WSH plays the part of the host — it makes objects and services available for the script and provides a set of guidelines within which the script is executed. Among other things, Windows Script Host manages security and invokes the appropriate script engine

Windows Script Host is built into Microsoft Windows 98, 2000, and Millennium Editions and higher versions.

A Windows script is a text file. We can create a script with any text editor as long as we save our script with a WSH-compatible script extension (.js, vbs, or .wsf).
The most commonly available text editor is already installed on our computer — Notepad. We can also use your favorite HTML editor, VbsEdit, Microsoft Visual C++, or Visual InterDev.

1.2 Creating a script with Notepad

1.Start Notepad.

2.Write your script. For example purposes, type Msgbox "Hello VB Script"

3.Save this text file with a .vbs extension (instead of the default .txt extension). For example, Hello.vbs

4.Navigate to the file you just saved, and double-click it.

5.Windows Script Host invokes the VB Script engine and runs your script. In the example, a message box is displayed with the message "Hello VB Script"

1.3 Hosting Environments and Script Engines

Scripts are often embedded in Web pages, either in an HTML page (on the client side) or in an ASP page (on the server side).
In the case of a script embedded in an HTML page, the engine component that interprets and runs the script code is loaded by the Web browser, such as Internet Explorer.

In the case of a script embedded in an ASP page, the engine that interprets and runs the script code is built into Internet Information Services (IIS).

Windows Script Host executes scripts that exist outside an HTML or ASP page and that stand on their own as text files.

1.4 Available Script Engines

Generally, we write scripts in either Microsoft JScript or VBScript, the two script engines that ship with Microsoft Windows 98, 2000 and Millennium Editions.

We can use other script engines, such as Perl, REXX, and Python, with Windows Script Host.

A stand-alone script written in JScript has the .js extension; a stand-alone script written in VBScript has the .vbs extension. These extensions are registered with Windows. When we run one of these types of files, Windows starts Windows Script Host, which invokes the associated script engine to interpret and run the file.


The comment argument is the text of any comment we want to include.

2.0 Purpose of comments:

o We can use comments for making the script understandable.
o We can use comments for making one or more statements disable from execution.

2.1 Syntax

Rem comment (After the Rem keyword, a space is required before comment.)


Apostrophe (') symbol before the comment

2.2 Comment/Uncomment a block of statements

Select block of statement and use short cut key Ctrl + M (for comment)
Select comment block and use short cut key Ctrl + Shift + M (for uncomment)

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