Скачать или смотреть Mastering Late Binding with the MSGraph Chart Object in VBA

Discover how to efficiently use `Late Binding` with `MSGraph` objects in VBA, avoiding the need for additional libraries while maintaining flexibility.
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This video is based on the question https://stackoverflow.com/q/63451291/ asked by the user 'Fil' ( https://stackoverflow.com/u/9642355/ ) and on the answer https://stackoverflow.com/a/63451535/ provided by the user 'Erik A' ( https://stackoverflow.com/u/7296893/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering Late Binding with the MSGraph Chart Object in VBA

When working with VBA in MS Access, developers often face the challenge of using various libraries, such as the Microsoft Graph Object Library. While early binding provides excellent performance and IntelliSense features, it requires that the library be added as a reference in the project. This can lead to issues when deploying your application across different systems. The alternative? Late binding, which offers greater flexibility by avoiding those direct dependencies. In this guide, we'll explore how to implement late binding specifically for the MSGraph Chart object.

Understanding Early Binding vs Late Binding

Early Binding

Definition: Directly references an object library, allowing for compile-time checks and IntelliSense support.

Example:

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Pros: Easier to write and debug code thanks to autocomplete features.

Cons: Requires library reference which may not exist on all systems, increasing deployment complexity.

Late Binding

Definition: Uses generic object variables at runtime instead of early binding to specific types.

Example:

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Pros: Avoids issues with missing library references, leading to more robust code across various installations.

Cons: No compile-time type checking and lacks IntelliSense support.

Implementing Late Binding for MSGraph

Below, we will rework an example of how to use late binding with the MSGraph Chart object. The original implementation using early binding will be compared to the late binding version.

Early Binding Implementation (Sample Code)

This is how the typical early binding code looks, which requires the Microsoft Graph 16.0 Object Library to be added:

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Late Binding Implementation (Revised Code)

Here's how to implement the same logic using late binding:

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

Key Changes Explained

Object Declaration: Instead of using specific types (e.g., Graph.Chart, Graph.Series), generic Object types are declared.

No Collection Initialization: In the modified code, there’s no need to initialize a VBA.Collection for myChartSeries, as we're now iterating directly through the collection of series in myChart.

Type Safety: By using Object, you maintain flexibility without compromising functionality.

Conclusion

Utilizing late binding in VBA can significantly simplify the development process and enhance the compatibility of your applications. The transition from early binding does require minor adjustments, but the benefits, especially in multi-user environments, are often well worth the effort. Now, you have the tools and knowledge at your disposal to confidently implement late binding with the MSGraph Chart Object.

By adopting this approach, developers can build robust, distributable Access applications without the hassle of managing references across different installation environments. Happy coding!