System development in Excel is about methods and approaches applied to programming with VBA in Excel. This category includes free templates that includes Excel add-ins and object-oriented programming for instance.
In this workbook, we have used the concept of object-oriented programming (OOP) when we have written VBA code to perform tasks in the workbook.
Here you can download an Excel workbook with VBA code that is ready to be saved as an Excel add-in.
Here you can download free code to create your own functions (UDF) in Excel with custom descriptions, a user-defined function (UDF) can be placed in an existing or a new category of functions.