How to use Telnet in VBScript

Network Component provides an easy-to-use development interface to a variety of IP protocols. By using Network Component, you can very easily create or enhance applications with network features.

Network Component features the following: DNS, FTP, HTTP, HTTPs, ICMP Ping, IP-to-Country, MSN, NTP, RSH, SCP, SFTP, SNMP v1/v2c (Get, GetNext, Set), SNMP Traps, SNMP MIB, SSH, TCP, Telnet, TFTP, UDP, Telnet, Wake-On-LAN and more.

Network Component can be well integrated into any development platform that supports ActiveX objects.

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Step 1: Download and install the Network Component

Download Network Component from the ActiveXperts Download Site and start the installation. The installation guides you through the installation process.

Step 2: Create a new script

Create a new script using your favorite editor. You can simply use notepad. However, a VBScript editor is recommended, so you can browse through objects, objects properties and object functions.

You're now able to write a more advanced script to communicate using the Network Component.

Step 3: Create the Network Component object in VBScript

Create a new VBScript file called DEMO.VBS. It is recommended to insert the following line on top of your code:

Option Explicit

This statement requires that all variable names be defined (with the Dim statement), to avoid simple typos that can cause incredible headaches and long debugging sessions for something that should have never happened.

Now, declare the Network Component object(s):

Dim objTcp

Create the Network Component object(s) like this:

Set objTcp      = CreateObject( "AxNetwork.Tcp" )

Now, add the following lines to the file to have your first Network Component VBScript program:

WScript.Echo "Version: " & objTcp.Version
WScript.Echo "License Status: " & objTcp.LicenseStatus

Appendix: Full source code

' ********************************************************************
' ActiveXperts Network Component sample - Telnet client communication
'    Connects to www.activexperts.com and reads page /network-component/demopage
' Written by ActiveXperts Software 
'    https://www.activexperts.com
' ********************************************************************

Option Explicit

' Declare variables
Dim objTcp, objConst, fso, strReceived

' Create a Tcp instance
Set objTcp  	= CreateObject( "AxNetwork.Tcp" )
Set objConst	= CreateObject( "AxNetwork.NwConstants" )

' A license key is required to unlock this component after the trial period has expired.
' Call 'Activate' with a valid license key as its first parameter. Second parameter determines whether to save the license key permanently 
' to the registry (True, so you need to call Activate only once), or not to store the key permanently (False, so you need to call Activate
' every time the component is created). For details, see manual, chapter "Product Activation".
'
' objTcp.Activate "XXXXX-XXXXX-XXXXX", False

' Component info
Wscript.Echo "ActiveXpert Network Component " & objTcp.Version
Wscript.Echo "Build: " & objTcp.Build & vbCrLf & "Module: " & objTcp.Module
Wscript.Echo "License Status: " & objTcp.LicenseStatus & vbCrLf & "License Key: " & objTcp.LicenseKey & vbCrLf

' Set Logfile
Set fso = CreateObject( "Scripting.FileSystemObject" )
objTcp.LogFile = fso.GetSpecialFolder(2) & "\Tcp.log"
WScript.Echo "Log file: " & objTcp.LogFile & vbCrLf

objTcp.Protocol = objConst.nwSOCKET_PROTOCOL_TELNET

' Make a connection on port 80 to remote server
objTcp.Connect "www.activexperts.com", 80
Wscript.Echo "Connect to www.activexperts.com:80, result: " & objTcp.LastError
If objTcp.LastError <> 0 Or objTcp.ConnectionState <> objConst.nwSOCKET_CONNSTATE_CONNECTED Then
   WScript.Quit
End If

' YES, connection established.
WScript.Echo "Connection established" & vbCrLf
	
objTcp.Sleep 200
	
objTcp.SendString "GET /network-component/demopage/ HTTP/1.1"
objTcp.SendString "Host: www.activexperts.com" 
objTcp.SendString ""
	
objTcp.Sleep 1000
	
If objTcp.HasData Then
  strReceived = objTcp.ReceiveString
  WScript.Echo "RECV: " & strReceived
End If
      
objTcp.Sleep 200
  
' And finally, disconnect
objTcp.Disconnect
WScript.Echo "Disconnect."

WScript.Echo "Ready."

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You can download the complete samples here. There are many other working Network Component scripts on our site and shipped with the product.