What Is File Extension OCX?
ActiveX controls are small programs launched within Web browsers when you visit websites. A number of files are associated with the production and functioning of ActiveX controls, including those that use the OCX file extension.
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Function
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A file with the OCX file extension contains the instructions that your computer follows to launch an ActiveX control program described in the file. The instructions contained in OCX files are typically written in the C++ or Visual Basic programming languages.
Uses
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OCX files have a variety of uses and vary with the website in which they are found. Some common uses for OCX files are automatically resizing windows or launching an animated clip.
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Programs
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Files with the OCX file extension are made with software development programs, such as Microsoft Visual Studio 2010. Typically, OCX files are used with the Internet Explorer Web browser.
Warning
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In some cases, OCX files contains viruses, spyware or harmful programs, cautions Microsoft. Use caution when downloading and running OCX files, particularly those found on websites with which you are not familiar.
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