YourFirstVBScript
Let us write a VBScript to print out “Hello World”.
<html>
<body>
<script language=”vbscript” type=”text/vbscript”>
document.write(“Hello World!”)
</script>
</body>
</html>
In the above example, we called a function document.write, which writes a string into the
HTML document. This function can be used to write text, HTML, or both. So, the above code
will display the following result:
Hello World!
WhitespaceandLineBreaks
VBScript ignores spaces, tabs, and newlines that appear within VBScript programs. One can
use spaces, tabs, and newlines freely within the program, so you are free to format and indent
your programs in a neat and consistent way that makes the code easy to read and understand.
Formatting
VBScript is based on Microsoft’s Visual Basic. Unlike JavaScript, no statement terminators
such as semicolon is used to terminate a particular statement.
Single Line Syntax
Colons are used when two or more lines of VBScript ought to be written in a single line. Hence,
in VBScript, Colons act as a line separator.
<script language=”vbscript” type=”text/vbscript”>
var1 = 10 : var2 = 20
</script>
Multiple Line Syntax
When a statement in VBScript is lengthy and if user wishes to break it into multiple lines, then
the user has to use underscore “_”. This improves the readability of the code. The following
example illustrates how to work with multiple lines.
<script language=”vbscript” type=”text/vbscript”>
var1 = 10
var2 = 20
Sum = var1 + var2
document.write(“The Sum of two numbers”&_
“var1 and var2 is ” & Sum)
</script>
ReservedWords
The following list shows the reserved words in VBScript. These reserved words SHOULD NOT
be used as a constant or variable or any other identifier names.
| Loop | LSet | Me |
| Mod | New | Next |
| Not | Nothing | Null |
| On | Option | Optional |
| Or | ParamArray | Preserve |
| Private | Public | RaiseEvent |
| ReDim | Rem | Resume |
| RSet | Select | Set |
| Shared | Single | Static |
| Stop | Sub | Then |
| To | True | Type |
| And | As | Boolean |
| ByRef | Byte | ByVal |
| Call | Case | Class |
| Const | Currency | Debug |
| Dim | Do | Double |
| Each | Else | ElseIf |
| Empty | End | EndIf |
| Enum | Eqv | Event |
| Exit | False | For |
| Function | Get | GoTo |
| If | Imp | Implements |
| In | Integer | Is |
| Let | Like | Long |
| TypeOf | Until | Variant |
| Wend | While | With |
| Shared | Single | Static |
| Stop | Sub | Then |
| To | True | Type |
| And | As | Boolean |
| ByRef | Byte | ByVal |
| Call | Case | Class |
| Const | Currency | Debug |
| Dim | Do | Double |
| Each | Else | ElseIf |
| Empty | End | EndIf |
| Enum | Eqv | Event |
| Exit | False | For |
| Function | Get | GoTo |
| If | Imp | Implements |
| In | Integer | Is |
| Let | Like | Long |
| TypeOf | Until | Variant |
| Wend | While | With |
| Xor | Eval | Execute |
| Msgbox | Erase | ExecuteGlobal |
| Option Explicit | Randomize | SendKeys |
CaseSensitivity
VBScript is a case-insensitive language. This means that language keywords, variables,
function names and any other identifiers need NOT be typed with a consistent capitalization
of letters. So identifiers int_counter, INT_Counter and INT_COUNTER have the same meaning
within VBScript.
CommentsinVBScript
Comments are used to document the program logic and the user information with which other
programmers can seamlessly work on the same code in future. It can include information
such as developed by, modified by and it can also include incorporated logic. Comments are
ignored by the interpreter while execution. Comments in VBScript are denoted by two
methods.
Any statement that starts with a Single Quote (‘) is treated as comment. Following is the
example:
<script language=”vbscript” type=”text/vbscript”>
<!—
‘ This Script is invoked after successful login
‘ Written by : TutorialsPoint
‘ Return Value : True / False
//- >
</script>
Any statement that starts with the keyword “REM”. Following is the example:
<script language=”vbscript” type=”text/vbscript”>
<!—
REM This Script is written to Validate the Entered Input
| REM Modified by //- > </script> |
: Tutorials point/user2 |
Not all the modern browsers support VBScript. VBScript is supported just by Microsoft’s
Internet Explorer while other browsers (Firefox and Chrome) support just JavaScript. Hence,
developers normally prefer JavaScript over VBScript.
Though Internet Explorer (IE) supports VBScript, you may need to enable or disable this
feature manually. This tutorial will make you aware of the procedure of enabling and disabling
VBScript support in Internet Explorer.