Скачать или смотреть How to Pass Arguments with .OnAction in VBA

Learn how to effectively pass arguments to macros using the `.OnAction` property in VBA, with clear examples and solutions for common errors.
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This video is based on the question https://stackoverflow.com/q/71619368/ asked by the user 'Joseph Erickson' ( https://stackoverflow.com/u/3075813/ ) and on the answer https://stackoverflow.com/a/71619467/ provided by the user 'Tim Williams' ( https://stackoverflow.com/u/478884/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the Challenge: Passing Arguments with .OnAction in VBA

In VBA (Visual Basic for Applications), you may find yourself needing to link shapes, buttons, or other controls to macros, especially when you need to pass parameters to those macros. A common stumbling block is using the .OnAction property to trigger a macro while trying to pass an argument. This post will walk you through the problem you've encountered and how to solve it effectively.

Problem Statement

You might have written a simple macro, intended to display a message stored in a variable when a shape is clicked in Excel. However, upon setting up your .OnAction property, you may have encountered an error message like:

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

This can be frustrating, especially when you know that the basic functionality works for macros without parameters. So, what exactly went wrong?

Solution: Correctly Formatting the .OnAction String

The issue at hand largely concerns the way arguments are passed to a macro. When dealing with .OnAction, it’s crucial to ensure that the argument is properly formatted with quotes. Let’s break down the correct approach step by step.

Step-by-Step Solution

1. Setting Up the Macro

First, ensure your macro is defined correctly. For example, let’s say you have a macro named testIt that takes a string argument:

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

2. Passing the Argument Correctly

When you assign the .OnAction property of a shape (or similar control), you have to ensure the argument is enclosed in quotes appropriately. The correct format for setting the .OnAction would look like this:

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

Explanation of the Code:

The outer single quotes (') are required to indicate that you are calling a macro.

Inside these quotes, you wrap the macro name (testIt) and the argument (x) in double quotes.

Finally, we concatenate x with the rest of the string using the & operator.

3. Testing Your Macro

Now that you've formatted the .OnAction correctly, you can click on the shape in sheet2, and it should successfully trigger the testIt macro, displaying a message box with your string "hello".

Common Errors to Watch Out For

Missing Quotes: Always ensure the correct use of quotes around macro names and parameters.

Macro Availability: Confirm that the testIt macro is spelled correctly and is available in the current workbook.

Macro Security Settings: Ensure that macros are enabled in Excel; otherwise, they won't run regardless of how you set them up.

Conclusion

With the right syntax and understanding of how to format the .OnAction property, you can successfully pass parameters to your VBA macros. By following the guidance in this post, you'll be able to enhance the interactivity of your Excel applications significantly.

If you encounter any challenges or have questions, feel free to reach out. Happy coding!