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Quick Start

Clone the xlltemplate library using git. Open xlltemplate.sln and build (F5). This will create xlltemplate.xll and open Excel with the add-in loaded. As you type =XLL.FUNCTION in a cell you should see it appear in intellisense. You can press TAB to complete the function name and Ctrl-Shift-A to insert the argument text.

Build from scratch

The xll add-in library is open source so you can download it and build it yourself.

See an example of how to create an add-in