Manual From VBA to VSTO: Is Excels New Engine Right for You?

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You may not need to switch soon, but it looks like Microsoft is going to discontinue VBA in its new releases from on. At some point in time, you may have to transit to VSTO — unless you want to stay with older versions of Excel and related Office products. Is it just because it is a new product? The answer has something to do with the evolution of another product: Visual Basic, in particular VB 6.

To alleviate this problem, Microsoft came up with a new development tool, called Visual Studio. NET pronounced Dot-net. The VS. In addition, it has many other advantages that we will discuss later. In this book, I will just focus on the Visual Basic language of.

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NET, which is referred to as VB. Can you use VB. NET to program existing applications such as Excel? Can you use the power of Excel, as exemplified in its graphs, in VB. Yes, you can, but the process is involved and not very efficient. Sorry if the terminology has become too mystifying and confusing. NET environment, also called the. NET Framework. Uses more powerful forms with expanded potential. Enhances communication with Web Servers.

Protects users with better security. Protects code by hiding it from view and preventing inadvertent, inept changes. Improves the way you deploy new code and future updates to other users. All of these issues will receive due attention in the next chapters. The key issue remains: How do you create the new code? That will be our main concern.

Before we go into code issues, I want to address another point: Where is the new code going to reside? The Excel document has been given properties that contain directions to a certain DLL file at a certain location. Because VSTO code is built as a. But you can also store the file separately on a network where it can then be downloaded by each user the first time the Workbook is opened.

Other possible locations are a corporate intranet or a secured internet site. PIAs allow VB. NET programmability support option for each Office product during or after the installation process see How does VB. NET language is much more consistent, strict, and logical than what you are used to in the VBA version. Functions require parentheses, but methods reject them. Some indexes start at 0, others at 1. Some variables have to be initialized with the Set keyword, but not all.

As we will shortly see in greater detail, VB. NET is a much more streamlined language than VB. When creating new code from scratch in VSTO, you will have to get used to those stricter rules. One of them is that all type conversions have to be done explicitly for situations where there is no automatic conversion in VB.

ISBN 13: 9781932802146

You may ask yourself whether this is worth the price. Value property off the DateTimePicker control within the C solution without a problem. While debugging: In VBA, the. Value property is not exposed. I need to be able to grab the actual value of the wrapped control from VBA, but I am not sure how go about it whether it's possible or not I know that the control itself supports events but this is not the path I want to take. How can I expose a class in a document-level add-in for Excel using C to extend the range of properties accessible by default on.


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Net controls? This is the closest I got so far but it only allows you to expose the host item like Worksheet, Workbook, Chart etc. It allows you to call the methods though so I am going to investigate this further and come back with some feedback. You would need to create a public interface to expose the class to VBA, this works for me as a document level addin. Now you need to create a public interface for the method.

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In Sheet1. Double click Sheet1. Learn more about Teams. How to expose a C class to a VBA module in a document-level add-in? Ask Question. This is a hypothetical situation. So my question is: How can I expose a class in a document-level add-in for Excel using C to extend the range of properties accessible by default on.

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Update: This is the closest I got so far but it only allows you to expose the host item like Worksheet, Workbook, Chart etc. ComVisible true ] [System. ClassInterface System. None ] Now you need to create a public interface for the method.

Generic; using System.