Applies to: Excel 2013 | Office 2013 | Visual Studio
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Welcome to the Excel 2013 XLL Software Development Kit (SDK) documentation. This reference contains conceptual overviews, programming tasks, and samples to help you develop Microsoft Excel 2013 XLLs.
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Revised: November 2012
Download the Excel 2013 XLL SDK.
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The Excel 2013 XLL SDK includes the following:
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C application programming interface (API)—Includes header and source files that enable DLLs to access Excel 2013 functionality, and a description of the interface that a DLL should expose to work with the Excel Add-in Manager.
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Microsoft Visual Studio projects—Includes C/C++ source code and shows how to use the C API. These sample projects provide examples and they serve as a starting point for your own add-in development.
The SDK documentation contains the following sections:
Functionality Not Covered
The following subjects are not covered:
![Disk Disk](https://www.nesabamedia.com/wp-content/uploads/2019/09/Pengertian-Bitmap-dan-Vektor-Beserta-Ciri-Cirinya.jpg)
Microsoft Excel Software For Mac
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Developing user-defined functions and commands in Excel macro (XLM) sheets.
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Creating user-defined functions in DLLs that control the flow of execution of an XLM macro.Such functions work by returning a special flow control data type, which is also not described in this documentation.