|File Type||ActiveX Control|
|File Format||Proprietary (Microsoft)|
|Usage||Referenced by an application; not meant to be opened manually|
|Popularity||★ ★ ★ ★ ☆ Common|
Object that can be placed within an ActiveX form; typically has an event attached to it, such as handling scroll bar movement and the resizing of windows; commonly written in the Visual Basic or C++ programming languages.
Originally called an Object Linking and Embedding (OLE) custom control. Now referred to as an ActiveX control, which is the component object within Microsoft's ActiveX technologies.