An ActiveX control is a component program object that can be re-used by many application programs within a computer or among computers in a network. The technology for creating ActiveX controls is part of Microsoft's overall ActiveX set of technologies, chief of which is the Component Object Model (COM).
The Basic Input Output System, usually referred to as BIOS, is software stored on a small memory chip on the motherboard. BIOS is sometimes incorrectly referred to as the Basic Integrated Operating System. BIOS instructs the computer on how to perform a number of basic functions such as booting and keyboard control.
The location of the file is important and must reside in the XLSTART folder of where the user's profile or Excel application is installed. This special path responds to the loading event of Excel and loads any file stored in this folder. Therefore, macros which are stored in the file in the path XLSTART will open too. Macros that require a global use are stored in this type of file (i.e. User Defined functions).