VBScript Tutorials - Herong's Tutorial Examples - v6.02, by Herong Yang
"WScript" Runtime Object Hierarchy
This section describes WSH runtime objects: WScript and its properties. A tutorial example is provided on how to use WScript.StdIn and WScript.StdOut.
Like any other scripting environment host, WSH provides several nice runtime objects to allow your VBScript code to interact with the environment:
Let's try a simple example with the StdIn and StdOut properties of the WScript:
' StdIn_StdOut.vbs '- Copyright (c) 1998 HerongYang.com. All Rights Reserved. Dim StdIn, StdOut Set StdIn = WScript.StdIn Set StdOut = WScript.StdOut Dim cmd Do While True StdOut.WriteLine StdOut.WriteLine "Herong, what can I do for you?" cmd = StdIn.ReadLine If cmd = "Nothing" Then Exit Do StdOut.WriteLine "Sorry, I am not programmed to do that." Loop
Now run it with cscript.exe:
C:\herong>cscript StdIn_StdOut.vbs Herong, what can I do for you? Make me rich Sorry, I am not programmed to do that. Herong, what can I do for you? Make me happy Sorry, I am not programmed to do that. Script execution time was exceeded on script "C:\herong\StdIn_StdOut.vbs". Script execution was terminated.
The code worked nicely. But it was terminated because of the execution time limit. You need to run it with a longer limit specified in the command line, like //T:600 for 10 minutes:
cscript //T:600 StdIn_StdOut.vbs
Note also this example can not be executed with the wscript.exe host, because it does not support StdIn and StdOut properties. Running "wscript StdIn_StdOut.vbs" will result an error: "The handle is invalid"
Table of Contents
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
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript
What is WSH (Windows Script Host)?
"cscript.exe/wscript.exe" Command Version and Options
►"WScript" Runtime Object Hierarchy
"oShell.Exec(cmd)" - Running System Command with a Script
WSF - Windows Script File XML Format