What Is an OCX File?

An OCX file is an ActiveX control used by the Microsoft OLE (Object Linking and Embedding). OCX files are also called "ActiveX components," "ActiveX controls" and "plugins."

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  1. Function

    • OCX files perform automation functions and cross-link program functions written in different computer programming languages. ActiveX controls perform functions such as rendering the Windows desktop, resizing windows and handling the scroll bar.

    Significance

    • OCX files help to reduce program development time and increase computer efficiency by allowing different Windows and program components to work together.

    Features

    • Web browsers (Firefox and Internet Explorer) use OCX files to render web pages and to perform internal program functions. Examples include the Flash Player plugin and the Adobe Acrobat plugin.

    Software

    • Examples of software that use OCX files include Web browsers (Firefox and Internet Explorer), Microsoft Access, Visual Basic and Windows.

    Examples

    • Examples of OCX files include plugin.ocx (IE8), dmview.ocx (Logical Disk Manager for Windows), wmidx.ocx (Windows Media Services) and Flash10d.ocx (Flash Player 10 plugin).

    Warning

    • Since OCX files are critical to Windows, it is not recommended to delete them. Deleting OCX files will cause system instability, or will make the computer unbootable.

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