How to Dynamically Change Variable Values in Inno Setup Using Pascal

Discover how to manage variable values based on selected radio button options in Inno Setup with a clear, step-by-step Pascal script guide.
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How to Dynamically Change Variable Values in Inno Setup Using Pascal

If you're working with Inno Setup and using Pascal for your script, you might come across some challenges, especially when trying to read values from user selections. Specifically, you might need to update a variable based on the selected radio button from a wizard page.

In this guide, we’ll delve into how you can effectively manage this scenario. We’ll break down the solution into clear steps, ensuring you understand how to set up your Inno Setup script to dynamically change a variable based on user selection.

The Problem: Tracking Selected Radio Button Values

As an example, let’s consider you have multiple radio buttons that allow users to select options during installation, and based on that selection, you want to modify a variable that determines where files unpack on the user's PC. You might already have the VersionNumber variable set, but it doesn’t reflect the selected radio button value.

The Solution: Implementing Dynamic Updates in Your Script

Here’s a clear breakdown of how to implement this:

Step 1: Declare Your Variables

First, declare the necessary variables which will hold your radio button index values.

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Step 2: Initialize Your Wizard Page

Within the InitializeWizard procedure, you need to set up your wizard page and add the options (radio buttons) that users will select.

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Step 3: Get the Selected Value

You’ll need a function that retrieves the currently selected option based on the user’s choice and assigns it to your variable.

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Step 4: Putting It All Together

By combining the above steps, you can ensure that your script checks the selected radio button and updates the VersionNumber variable dynamically. Here’s the complete implementation:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

This simple yet effective approach allows you to read the currently selected radio button in Inno Setup and change related variables accordingly. By following these steps, you should be able to manage user selections seamlessly during your setup process.

If you have further questions about programming with Inno Setup or Pascal, feel free to ask in the comments below!