What is CTL? What Opens a CTL? File Format List from WhatIs.com

File Extension

CTL File Format

ActiveX control file

CTL is a file extension for an ActiveX control file used with Microsoft Visual Studio. CTL stands for ConTroL. CTL files contain the source code for a Visual Basic User Control. CTL files store corresponding binary data in a CTX file. CTL files can be opened by a text editor and by Microsoft Visual Studio.


MIME type: application/octet-stream


Learn more about .CTL files:

Visit the Microsoft Visual Studio web page.

Learn about Visual Studio at ITKnowledgeExchange.com.

This was last updated in August 2010
Editorial Director Margaret Rouse

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