Running a Batch File from VBScript and Automating Input

Are you looking to automate the execution of a batch file from within a VBScript and have it handle pop-up windows? This is a common challenge in environments where you need to run GUI applications or perform tasks that require user input. In this article, we will explore how to achieve this using VBScript and how to handle the inevitable pop-up windows that may arise. We will also discuss an alternative solution using AutoHotKey for those who prefer a simpler approach.

Introduction to VBScript and Batch Files

VBScript (Visual Basic Scripting) is a lightweight and powerful scripting language used on Windows operating systems in the development and automation of tasks. It integrates well with other Windows utilities and can be used to automate a wide range of tasks, from file management to complex administrative procedures. One of its powerful features is its ability to execute batch files (.bat).

A batch file is a type of script file that contains a series of commands that a command interpreter can run. These files are particularly useful for automating repetitive tasks or tasks that are too complex to perform through the command line alone. Batch files are also widely used in CI/CD pipelines, system maintenance, and other administrative tasks.

Challenges with Batch File Pop-Ups

While batch files are incredibly versatile, they can pose challenges when it comes to handling pop-up windows. Unlike higher-level languages, the cmd.exe interpreter used to run batch files does not have a built-in method to simulate user input or interact with graphical user interfaces (GUIs). This lack of functionality means that if a batch file requires user input (such as pressing ENTER), you need a workaround. Here's how you can achieve this within a VBScript environment.

Using VBScript to Execute a Batch File

VBScript provides several methods to interact with the command-line environment and execute batch files. To execute a batch file from a VBScript, you can use the Set WshShell ("") object, and then use the method. Here’s an example of how to do this:

Set WshShell ("")
"", 1, True

In this example, the method runs the batch file located at The second parameter 1 specifies that the window should be hidden (0 for visible), and the third parameter True waits for the process to complete (set to False to avoid waiting).

Handling Pop-Up Windows

When a batch file requires user input, such as pressing the ENTER key, you have a few options to handle this. One common approach is to simulate key presses using the SendKeys method provided by VBScript. Here is how you can simulate the ENTER key:

"{ENTER}"

In this code snippet, the {ENTER} keystroke is sent to the active window, effectively simulating a user pressing the ENTER key. However, this method has limitations and may not work in all scenarios, especially with modern applications that are more secure and less susceptible to keystroke simulations.

Alternative: Using AutoHotKey for GUI Automation

For more robust and reliable GUI automation, especially when dealing with modern applications, you might want to consider using AutoHotKey. AutoHotKey is a free and open-source program that allows users to automate almost any action on Windows. It provides a powerful scripting language that can be used to create custom hotkeys, GUI scripts, and other automation tasks. Here's how you can use AutoHotKey to handle batch file pop-ups:

Example AutoHotKey Script for Batch File Automation

Create a new AutoHotKey (.ahk) file and add the following script to handle batch file pop-ups:

Run, 
AThreads : () ; Ensure all threads are restored for clean exit
(
    WinWaitActive "Title of Popup Window" ; Wait for the popup window to appear
    Send, {ENTER} ; Send the ENTER key to the active window
)
AThreads.Dump() ; Clean up any leftover threads

In this script:

Run command is used to start the batch file.

WinWaitActive "Title of Popup Window" waits for the specific window to appear (change "Title of Popup Window" to the actual title of the window).

Send, {ENTER} sends the ENTER key to the active window, simulating a user pressing the key.

() and AThreads.Dump() ensure proper cleanup of resources.

Conclusion

Automating the execution of batch files from VBScript can be a powerful tool for task automation. While VBScript offers robust functionality for executing batch files, handling pop-up windows can be challenging. By using the SendKeys method, you can simulate user input, but for more reliable and modern applications, AutoHotKey provides a more robust solution. Whether you opt for VBScript or AutoHotKey, these tools can significantly enhance your ability to automate tasks in Windows environments.