What's New in the C API for Excel
Last modified: April 19, 2012
Applies to: Excel 2013 | Office 2013 | Visual Studio
In conjunction with Microsoft Excel 2013, the Microsoft Excel 2013 XLL Software Development Kit (SDK) includes support for the following features.
The Microsoft Excel 2013 XLL SDK supports calling back to all of the new worksheet functions in Excel 2013. For more information about calling Excel 2013 functions, see Calling into Excel from the DLL or XLL.
Asynchronous User-defined Functions
Excel 2013 supports calling user-defined functions (UDF) asynchronously, which can improve performance by enabling several calculations to run at the same time. For more information about asynchronous UDFs, see Asynchronous User-Defined Functions.
Cluster connectors enable UDFs to run on high-performance compute clusters. For more information about creating cluster connectors, see Developing Excel Cluster Connectors.
You can now compile and link both 32-bit and 64-bit XLLs. For more information, see Creating XLLs.