The part 2 of the post which shows how to create a simple application with Windows Forms interface and SQL Server Database
This post explains how you can automatically install and activate an Excel Addin using VBA code. At the end you can also download the installation file.
A very easy tutorial about how to create in Visual Studio and SQL Server a simple application
Excel model which can help accountants analyze the aging of Accounts Receivable and calculate the Allowance for Doubtful Accounts and the Bad Debt Expense