Creating


File > New > Project
Other Languages > Visual C# > Office/SharePoint > Add-ins
Check the .NET Framework version is correct at the top
Choose Excel Web Add-in
Change the Name to something appropriate
Change the Location by clicking on the Browse button
SS
Press OK


Create Add-in Wizard
select "Add new functionalities to Excel"
Press Finish


This will create a solution that contains two projects


ExcelWebAddIn1 - This is the Manifest project
ExcelWebAddIn1Web - This contains the corresponding HTML pages


Press Run to build and run the solution
SSL Prompt - You might see a prompt says that this project is configured to use SSL.
This will open Excel and display the corresponding task pane


You might also see there is a problem with the certificate



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