User-Defined Functions (UDFs) in VBA (Visual Basic for Applications) are custom functions that you can create to perform calculations or operations that are not built into Excel. UDFs are particularly useful for tasks that require specialized or repetitive calculations. Here’s a small explanation and example of how to create and use a UDF in VBA: How to Create Functions for YESTERDAY() & TOMORROW() #Excel #VBA #Programming #Automation #CustomFunctions