Windows Script Host

Windows Script Host (WSH)

Other names	Windows Scripting Host
Developer(s)	Microsoft
Stable release	5.812
Operating system	Microsoft Windows
Type	Automation technology
License	Proprietary commercial software
Website	Windows Script Host overview

The Microsoft Windows Script Host (WSH) (formerly named Windows Scripting Host) is an automation technology for Microsoft Windows operating systems that provides scripting abilities comparable to batch files, but with a wider range of supported features. This tool was first provided on Windows 95 after Build 950a on the installation discs as an optional installation configurable and installable by means of the Control Panel, and then a standard component of Windows 98 (Build 1111) and subsequent and Windows NT 4.0 Build 1381 and by means of Service Pack 4. The WSH is also a means of automation for Internet Explorer via the installed WSH engines from IE Version 3.0 onwards; at this time VBScript became means of automation for Microsoft Outlook 97. The WSH is also an optional install provided with a VBScript and JScript engine for Windows CE 3.0 and following and some third-party engines including Rexx and other forms of Basic are also available.

It is language-independent in that it can make use of different Active Scripting language engines. By default, it interprets and runs plain-text JScript (.JS and .JSE files) and VBScript (.VBS and .VBE files).

Users can install different scripting engines to enable them to script in other languages, for instance PerlScript. The language-independent filename extension WSF can also be used. The advantage of the Windows Script File (.WSF) is that it allows multiple scripts ("jobs") as well as a combination of scripting languages within a single file.

WSH engines include various implementations for the Rexx, ooRexx, BASIC, Perl, Ruby, Tcl, PHP, JavaScript, Delphi, Python, XSLT, and other languages.

Windows Script Host is distributed and installed by default on Windows 98 and later versions of Windows. It is also installed if Internet Explorer 5 (or a later version) is installed. Beginning with Windows 2000, the Windows Script Host became available for use with user login scripts.

Usage

Windows Script Host may be used for a variety of purposes, including logon scripts, administration and general automation. Microsoft describes it as an administration tool. WSH provides an environment for scripts to run – it invokes the appropriate script engine and provides a set of services and objects for the script to work with. These scripts may be run in GUI mode (WScript.exe) or command line mode (CScript.exe), or from a COM object (wshom.ocx), offering flexibility to the user for interactive or non-interactive scripts. Windows Management Instrumentation is also scriptable by this means.

The WSH, the engines, and related functionality are also listed as objects which can be accessed and scripted and queried by means of the VBA and Visual Studio object explorers and those for similar tools like the various script debuggers, e.g. Microsoft Script Debugger, and editors.

WSH implements an object model which exposes a set of Component Object Model (COM) interfaces. So in addition to ASP, IIS, Internet Explorer, CScript and WScript, the WSH can be used to automate and communicate with any Windows application with COM and other exposed objects, such as using PerlScript to query Microsoft Access by various means including various ODBC engines and SQL, ooRexxScript to create what are in effect Rexx macros in Microsoft Excel, Quattro Pro, Microsoft Word, Lotus Notes and any of the like, the XLNT script to get environment variables and print them in a new TextPad document, and so on.

The VBA functionality of Microsoft Office, Open Office (as well as Python and other installable macro languages) and Corel WordPerfect Office is separate from WSH engines although Outlook 97 uses VBScript rather than VBA as its macro language.

Python in the form of ActiveState PythonScript can be used to automate and query the data in SecureCRT, as with other languages with installed engines, e.g. PerlScript, ooRexxScript, PHPScript, RubyScript, LuaScript, XLNT and so on. One notable exception is Paint Shop Pro, which can be automated in Python by means of a macro interpreter within the PSP programme itself rather than using the PythonScript WSH engine or an external Python implementation such as Python interpreters supplied with Unix emulation and integration software suites or other standalone Python implementations et al. as an intermediate and indeed can be programmed like this even in the absence of any third-party Python installation; the same goes for the Rexx-programmable terminal emulator Passport. The SecureCRT terminal emulator, SecureFX FTP client, and related client and server programmes from Van Dyke are as of the current versions automated by means of the WSH so any language with an installed engine may be used; the software comes with VBScript, JScript, and PerlScript examples.

As of the most recent releases and going back a number of versions now, the programmability of 4NT / Take Command in the latest implementations (by means of "@REXX" and similar for Perl, Python, Tcl, Ruby, Lua, VBScript, JScript and the like and so on) generally uses the WSH engine. The ZOC terminal emulator gets its ability to be programmed in Rexx by means of an external interpreter, one of which is supplied with the programme, and alternate Rexx interpreters can be specified in the configuration of the programme. The MKS Toolkit provides PScript, a WSH engine in addition to the standard Perl interpreter perl.exe which comes with the package.

VBScript, JScript, and some third-party engines have the ability to create and execute scripts in an encoded format which prevents editing with a text editor; the file extensions for these encoded scripts is .vbe and .jse and others of that type.

Unless otherwise specified, any WSH scripting engine can be used with the various Windows server software packages to provide CGI scripting. The current versions of the default WSH engines and all or most of the third-party engines have socket abilities as well; as a CGI script or otherwise, PerlScript is the choice of many programmers for this purpose and the VBScript and various Rexx-based engines are also rated as sufficiently powerful in connectivity and text-processing abilities to also be useful. This also goes for file access and processing—the earliest WSH engines for VBScript and JScript do not since the base language did not, whilst PerlScript, ooRexxScript, and the others have this from the beginning.

WinWrap Basic, SaxBasic and others are similar to Visual Basic for Applications, These tools are used to add scripting and macro abilities to software being developed and can be found in earlier versions of Host Explorer for example. Many other languages can also be used in this fashion. Other languages used for scripting of programmes include Rexx, Tcl, Perl, Python, Ruby, and others which come with methods to control objects in the operating system and the spreadsheet and database programmes. One exception is that the Zoc terminal emulator is controlled by a Rexx interpreter supplied with the package or another interpreter specified by the user; this is also the case with the Passport emulator.

VBScript is the macro language in Microsoft Outlook 97, whilst WordBasic is used for Word up to 6, PowerPoint and other tools. Excel to 5.0 uses Visual Basic 5.0. In Office 2000 forward, true Visual Basic for Applications 6.0 is used for all components. Other components use Visual Basic for Applications. OpenOffice uses Visual Basic, Python, and several others as macro languages and others can be added. LotusScript is very closely related to VBA and used for Lotus Notes and Lotus SmartSuite, which includes Lotus Word Pro (the current descendant of Ami Pro), Lotus Approach, Lotus FastSite, Lotus 1-2-3, &c, and pure VBA, licensed from Microsoft, is used in Corel products such as WordPerfect, Paradox, Quattro Pro &c.

Any scripting language installed under Windows can be accessed by external means of PerlScript, PythonScript, VBScript and the other engines available can be used to access databases (Lotus Notes, Microsoft Access, Oracle Database, Paradox) and spreadsheets (Microsoft Excel, Lotus 1-2-3, Quattro Pro) and other tools like word processors, terminal emulators, command shells and so on. This can be accomplished by means of the WSH, so any language can be used if there is an installed engine.

In recent versions of the Take Command enhanced command prompt and tools, the "script" command typed at the shell prompt will produce a list of the currently installed engines, one to a line and therefore CR-LF delimited.

Examples

The first example is very simple; it shows some VBScript which uses the root WSH COM object "WScript" to display a message with an 'OK' button. Upon launching this script the CScript or WScript engine would be called and the runtime environment provided.

Content of a file hello0.vbs

WScript.Echo "Hello world"
WScript.Quit

WSH programming can also use the JScript language.

Content of a file hello1.js

WSH.Echo("Hello world");
WSH.Quit();

Or, code can be mixed in one WSF file, such as VBScript and JScript, or any other:

Content of a file hello2.wsf

<job>
<script language="VBScript">
  MsgBox "hello world (from vb)"
</script>
<script language="JScript">
  WSH.echo("hello world (from js)");
</script>
</job>

Security concerns

Windows applications and processes may be automated using a script in Windows Script Host. Viruses and malware could be written to exploit this ability. Thus, some suggest disabling it for security reasons. Alternatively, antivirus programs may offer features to control .vbs and other scripts which run in the WSH environment.

Since version 5.6 of WSH, scripts can be digitally signed programmatically using the Scripting.Signer object in a script itself, provided a valid certificate is present on the system. Alternatively, the signcode tool from the Platform SDK, which has been extended to support WSH filetypes, may be used at the command line.

By using Software Restriction Policies introduced with Windows XP, a system may be configured to execute only those scripts which are stored in trusted locations, have a known MD5 hash, or have been digitally signed by a trusted publisher, thus preventing the execution of untrusted scripts.

Available scripting engines

Note: By definition, all of these scripting engines can be utilised in CGI programming under Windows with any number of programmes and set up, meaning that the source code files for a script used on a server for CGI purposes could bear other file extensions such as .cgi and so on. The aforementioned ability of the Windows Script Host to run a script with multiple languages in it in files with a .wsh extension. Extended Html and XML also add to the additional possibilities when working with scripts for network use, as do Active Server Pages and so forth. Moreover, Windows shell scripts and scripts written in shells with enhanced capabilities like TCC, 4NT, etc. and Unix shells under interoperability software like the MKS Toolkit can have scripts embedded in them as well.

Engine name	Scripting language implemented	Base language	File extensions	Availability	Produced by	Status	Initial release date	Encoded scripts	Notes
VBScript	Microsoft VBScript	Microsoft Visual Basic	.vbs	Installed by default	Microsoft	default install	1999	Yes, .vbe	Default windows host script
JScript	Microsoft JScript	ECMAScript	.js	Installed by default	Microsoft	default install	1999	Yes, .jse	Default java script host
WinWrap Basic	WinWrap Basic	Basic	.wwb	In the main WWB installation	Polar Engineering	Standard functionality of WWB; Utilises both .NET and COM	2004	Yes
PerlScript	Perl	Perl 5	.pls	with ActiveState Perl	ActiveState	Open source	1999	Reportedly yes
PScript	Perl	Perl 5, CGI functionality	.p, .ps	with MKS Toolkit	MKS	Commercial	2001
XBScript	xBase Scripting Engine	xBase (Clipper)	.xbs, .prg	Clipper	with XBScript sofrware	Commercial
LotusScript WSH	LotusScript	Microsoft Visual Basic (q.v.)	.nsf	Third party download	Service Desk Plus	Freeware	2001
RexxScript	Rexx	Rexx	.rxs, .rx, .rex	With some Rexx implementations	Various	Freeware	1998
ooRexxScript	Open Object REXX	REXX	.rxs	with Open Object Rexx or free from some third parties	Open Object Rexx team	Open source
PythonScript	Python	Python	.pys	SourceForge & with ActivePython	The Pywin32 project	Open source
TclScript	Tcl/Tk	Tcl/Tk	.tcls	SourceForge	ActiveState or third party	Open source
ActivePHPScript	PHP	PHP	.phps	with PHP	PHP team	Open source
PHPScript	PHP	PHP	.phps	with PHP	PHP team	Open source			Earlier version of ActivePHPScript
RubyScript	Ruby	Ruby	.rbs	with Ruby distribution	Ruby team	Open source		Yes
XLNTScript	XLNT	DCL	.xcs	with XLNT	Advanced Systems Concepts, Inc.	Commercial	1997		An OpenVMS DCL-based multi-purpose scripting application for Windows
LuaScript	Lua	Lua	.lua	with Lua	Lua organisation	Open Source
Object REXX engine	Object REXX	Rexx	.rex, .rxs	with IBM Object REXX	IBM	Commercial	2002
XML Engine	XML parsing	Extended HTML, XML	.xml	with many XML implementations	Elf Data	de facto Default install	2000		Macintosh too
Kixtart WSH Engine	Kixtart	KixTart, MS-DOS, Windows 95. Windows NT shells	.kix	with KixStart	Microsoft Netherlands	Windows Resource Kits and other resources	1996		Download from Microsoft or elsewhere, aka KixStart32
NullScript	NullScript	Null language	.ns	with NullScript	NullScript Organisation	Windows Resource Kits and other resources	1999
ForthScript	Forth	Forth	.fth, others	Forth	DMOZ	Open Source
Haskell Script	Haskell	Haskell	*.hsk (provisional), others	free download		Open Source
XSLT WSH Engine	XSLT	XSLT	.xslt	free download	Open Source
CobolScript WSH Engine	Cobol	Cobol	.cbl. .cob, .cb	Fujitsu Cobol 3 -- free for educational use	Commercialware from Fujitsu free with free compiler for educators &c	Proprietary
Delphi scripting engine	Delphi	Delphi, a Pascal variant	.dlp, .del, .	In some Delphi distributions or resource kits	Commercial		2003
DMDScript	DMDScript	D, a major incrementation of C	.dmd	DMD Distributions, download	Freeware	Available on Web	2014	DMD
C# Script	C#	Microsoft C#.NET	.cs. .c#, others	Source code available	Open Source, active development underway	unclear	2013
Small C Scripting Engine	C	C (K&R, Ansi)	.c, others	Various locations, check Web		Freeware	2009
JavaScript WSH Engine	JavaScript/Java	Java & variants	.java, .j, jva, others	With many JavaScript implementations	Sun/Other Java Organisations	Freeware
Take Command WSH Engine	4NT/Take Command	TCC, the current version of 4NT p	.btm, .cmd, bat, others	Check JP Software	JP Software	Proprietary	2015		Early development
92Script WSH Engine	TI-89/92+/Voyager 200 TI-Basic	Calculator TI-Basic	.92bs	Project Web/FTP site	Various independent programmers	Experimental, Open Source	2014	"possible"	Beta Q4 2015 for main engine; graphing functionality (92Script/Tk) then or later
48Script WSH Engine	HP-48 Calculator family on-board programming language	HP 48 Programming Language, distant relative of Forth, Basic, Lisp	.48s	Project Web/FTP site	Various independent programmers	Experimental	2015	Planned	Status as of 2015-09-30. Language has Lisp, Basic, Forth, and other influences.
Fortran Script	Fortran	Fortran 77	.for, .ftn. f77, f90, f95	Various	Various	Experimental proof-of-concept, academic exercise, shareware, commercial, open source.	2000
PascalScript	Object Pascal	Pascal 7	.pas, .ops, other	Object Pascal	RemObjects	Freeware	2001		Can also be used with Delphi directly
Lisp WSH Engine	Lisp	Lisp	.lisp, .lsp	Various Lisp tools	AutoLisp and others	Freeware or Shareware
BESEN	ECMA-JavaScript	Java and Variants	.bes, .bsn, others	SourceForge	BESEN Organisation	Open Source	2011
ECMAScript WSH engines	Java and Variants	Various	Various	Various	Various	Experimental, Freeware, Open Source, Shareware, Proprietary, Commercialware	2005		There are numerous ECMAScript implementations but not all have WSH engines
CFXScript WSH Engine	Casio CFX-9850 and fx Calculator series on-board programming language	Casio Calculator Programming Language, as ported to various operating systems as CFW	.cfxb	Project Web/FTP Sites	independent programmers	Experimental	2015	Planned	Status as of 2015-09-30. Language has elements of Basic, Forth, Fortran, and others.
SharpCalcScript WSH Engine	Sharp graphing calculators on-board programming language	Sharp S-Basic as ported to windows as NeusSFortran	.scsb	Project Web/FTP Sites	independent programmers	Experimental	2015	Planned	Status as of 2015-09-30. Also subsumes the S-Basic language of Sharp's Pocket Computers.

There have been suggestions of creating engines for other languages, such as LotusScript, SaxBasic, BasicScript, KiXtart, awk, bash, csh and other Unix shells, 4NT, cmd.exe (the Windows NT shell), Windows PowerShell, DCL, C, C++, Fortran and others. The XLNT language is based on DCL and provides a very large subset of the language along with additional commands and statements and the software can be used in three ways: the WSH engine (*.xcs), the console interpreter (*.xlnt) and as a server and client side CGI engine (*.xgi).

When a server implementing CGI such as the Windows Internet Information Server, ports of Apache and others, all or most of the engines can be used; the most commonly used are VBScript, JScript, PythonScript, PerlScript, ActivePHPScript, and ooRexxScript. The MKS Toolkit PScript program also runs Perl. Command shells like cmd.exe, 4NT, ksh, and scripting languages with string processing and preferably socket functionality are also able to be used for CGI scripting; compiled languages like C++, Visual Basic, and Java can also be used like this. All Perl interpreters, ooRexx, PHP, and more recent versions of VBScript and JScript can use sockets for TCP/IP and usually UDP and other protocols for this.

Version history

Windows version	Shipped with WSH version	Last redistributable version
Windows 95	None (separate redistributable)	5.6
Windows NT 4.0	None (separate redistributable)	5.6
Windows CE 3.0	1.0 (optional install on installer disc)	2.0
Windows 98	1.0	5.6
Windows 98 Second Edition	1.0	5.6
Windows 2000	2.0 (also termed WSH 5.1)	5.7
Windows 2000 SP3, SP4 and SP5	5.6	5.7
Windows Me	2.0 (also termed WSH 5.1)	5.6
Windows XP	5.6	5.7
Windows XP SP3	5.7	Not applicable
Windows Server 2003	5.6	5.7
Windows Vista	5.7	Not applicable
Windows Server 2008	5.7	Not applicable
Windows 7	5.8	Not applicable
Windows Server 2008 R2	5.8	Not applicable
Windows 8	5.8	Not applicable
Windows Server 2012	5.8	Not applicable
Windows 10	5.812	Not applicable
Windows Server 2016	5.812	Not applicable

The redistributable version of WSH version 5.6 can be installed on Windows 95/98/Me and Windows NT 4.0/2000. WSH 5.7 is downloadable for Windows 2000, Windows XP and Windows Server 2003. Recently , redistributable versions for older operating systems (Windows 9x and Windows NT 4.0) are no longer available from the Microsoft Download Center.

Since Windows XP Service Pack 3, release 5.7 is the only version available from Microsoft, with newer revisions being included in newer versions of Windows since.

See also

• JScript .NET

links

• Host