Mediation. A settlement of a dispute or controversy by setting up an independent person between two contending parties in order to aid them in the settlement of their disagreement. In International Law, mediation is the friendly interference of one state in the controversies of nations.
User-Defined VBA Function & Sub Procedures. In Excel Visual Basic, a set of commands to perform a specific task is placed into a procedure, which can be a Function procedure or a Sub procedure (also known as functions and subroutines).
VBA is the initials of  Visual BASIC for application . It is a programming language which makes it possible to the user to conceive and to automate common tasks such as objects, methods, properties, events, instructions and functions in applications like Excel or WinWord for example.