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.OCX File Extension

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File TypeActiveX Control

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CategoryDeveloper Files


This file is saved in a binary format, which requires a specific program to read its contents.


Object file used within ActiveX forms; contains control behaviors that typically are triggered by user or program events; may be used for functions such as window resizing and scroll bar movement handling; commonly written programming languages, such as Visual Basic or C++.

More Information

OCX files were originally called Object Linking and Embedding (OLE) custom controls, but now are referred to as ActiveX controls, which is the component object used in Microsoft's ActiveX technologies.

OCX files may be created by various software development programs, including Microsoft Visual Studio.

Program(s) that open .OCX files
Microsoft Windows LogoWindows
Microsoft Visual Studio 2013
Updated 3/8/2010