This library makes it easy to create Excel add-ins for versions of Excel 12 or greater. See xlltemplate to get started.
In order to hook up Excel Help on this function to your Sandcastle Help File Builder documentation you must run shfb.bat in the xll12 folder.
To debug an add-in you must tell Visual Studio the full path to the Excel executable and what add-in to load.
In the project Properties in the Debugging tab the Command should be
$(registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\excel.exe)
To have Excel open your add-in when debugging and specify the default directory set Command Arguments to be
"$(TargetPath)" /p "$(ProjectDir)"