Opening a CTL File

The CTL file type is primarily associated with Visual Basic.

CTL	File extension: CTL
	File type:	ActiveX control file

What is a CTL file?

CTL files mostly belong to Visual Basic by Microsoft. CTL files contains text or non-binary data information of an object. It is primarily associated with Microsoft Visual Basic Integrated Development Environment developed for Microsoft Visual Studio. These files are Visual Basic User Control object files.

Main Usage: CTL files are used as developer files and are stored as simple text files. If one authors a project using Microsoft Visual Studio, the Visual Basic user Controls would be saved in a CTL file as source code. The content of a CTL file includes these controls and the output file of the respective project.
Associations:
- The control files dBASE or Database Management System (DBMS) use CTL extension. These control files contain names/locations of your data files, recovery information, backup information, log history and other internal information
- Cliptext Library Files also uses CTL extension. These files are associated with the EditPlus text editor, HTML editor etc. As the name suggests the Cliptext Library File stores cliptext.
- LabVIEW, a systems engineering software developed by NI, uses CTL extension for its custom control files.

How can I open a CTL file?

You need a suitable software like Visual Basic to open a CTL file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your CTL file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a CTL file directly in the browser:. Just drag the file onto this browser window and drop it.

Online CTL Text Viewer

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Programs that open and convert CTL files:

Visual Basic by Microsoft
See the previous paragraphs to learn more about the main application. CTL files are often referred to as Visual Basic developers because this type of file is primarily created or used by this software.
EditPlus (cliptext file) by ES-Computing
EditPlus is a text editor that allows users to edit code in several languages. It has features such as syntax highlighting, line numbering, a Hex Viewer, and FTP, FTPS and sftp capabilities. The CTL file format is used to store cliptext in EditPlus. This file format is classified as Simple text file. Related links: EditPlus on Wikipedia, EditPlus Wiki, EditPlus FAQs, CTL Files Submitted by Users, EditPlus Review
Notes by HCL Technologies
Notes is an enterprise email client that provides features such as email, calendar, to-do lists, contact management and discussion forums. The CTL file format contains data used by Notes. This file format is classified as Data. Related links: Notes on Wikipedia
PDP-10 (batch script file) by Digital Equipment Corporation
PDP-10 (Programmed Data Processor Model 10) is a family of mainframe computers manufactured by Digital Equipment Corporation (DEC). The CTL file is a batch script file used by PDP-10. This file format is classified as Executable. Related links: PDP-10 on Wikipedia, Guide for PDP-10 Emulator Mentioning CTL Files
Setup Information
StepMania (SMZIP package description file) by StepMania
StepMania is a cross-platform dance simulation video game and game engine. The CTL file format is used to install StepMania components such as themes and add-ons. The file is included inside a SMZIP file and contains information describing the package contents. This file format is classified as Game. Related links: StepMania on Wikipedia, StepMania Guide Mentioning CTL Files

CTL format details:

The file format determines how the data is stored in the file. The file format can be deduced from the file extension and the signature. File extension, signature and file format must match; otherwise errors will occur when the file is opened. If there are problems opening a file, you must first determine the file format used. Our analysis of the CTL files produces the following result:

You will often come across the CTL file type. This is used by different programs with different formats. The two most popular formats are as follows:

25% of all CTL files are based on the popular TIFF file format. TIFF is short for Tagged Image File Format. It stores raster graphics images that support color depths from 1 to 24-bit, lossy and lossless compression and multiple layers and pages. These files contain neither text nor words, but only data. The files are often between 220 KB and 1 MB in size. The file type was developed only in the last few years. The keywords DbQ8 and HdR9$ are typical for these files. A common filename is A1.CTL or A2.CTL.
10% of all CTL files have the same signature 00 00 00 00 00 00 00 00. They consist of unreadable binary data. The files are on average 96 KB in size and range from 66 KB to 110 KB. The files contain the following words: MACHINE NAME and CONTROLLER TYPE. The file name M3Axis-Tutorial.CTL or GRBL.ctl is characteristic of these files. Such CTL files store data about haas, tutorial, axis, fanuc, mach and mill.

The remaining 65% of all CTL files are different files with different signatures, such as LabVIEW Control data, Visual Basic user-defined control, JFIF, Control, DSET, load and OPTIONS. These files are often connected to pntsaccl, wctrains, canopen, data, objectdictionary, siemens, cdinfo, adas, asms or link. If you want to find out which format your CTL file belongs to, just click on the button "Choose your .ctl file to analyze".

Technical Data for CTL File Extension

File classification:

Developer

Related files:

ctlo, stl, clt, control, txt, grads, vi, lng, anf, ctrl, ma0, obs, zip, prn, dat, idr, cti, key, d2s, exe, dsr, dob, dep

Mime type:

text/x-vb, application/octet-stream

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: VisualBasic.UserControl, FileType: Visual Basic User Control, AppName: Visual Basic
EXEFile: vb6.exe

ProgramID: LabVIEWControl
EXEFile: C:\Robolab 2.5.4\Robolab254.exe %1

ProgramID: VisualBasic.UserControl
EXEFile: %ProgramFiles%\Microsoft Visual Studio\VB98\vb6.exe %1

ProgramID: VisualBasic.UserControl
EXEFile: F:\VisStudio\VB98\vb6.exe %1

ProgramID: VisualBasic.UserControl
EXEFile: %ProgramFiles%\VB98\vb6.exe %1

ProgramID: VisualBasic.UserControl
EXEFile: %ProgramFiles%\DevStudio\VB\vb5.exe %1

ProgramID: LabVIEWControl
EXEFile: %ProgramFiles%\National Instruments\LabVIEW 6.1\LabVIEW.exe

ProgramID: LabVIEWControl
EXEFile: %ProgramFiles%\National Instruments\LabVIEW 8.0\\LabVIEW.exe

ProgramID: LabVIEWControl
EXEFile: %ProgramFiles%\Robolab\Engine\ROBOLAB252.exe

ProgramID: VisualBasic.UserControl
EXEFile: %ProgramFiles%\VB6\VB98\vb6.exe

Show all 10 listings To Top

a ctl ActiveX control file is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with CTL files

Associate the CTL file extension with the correct application.
Update your software that should actually open activex control files. Because only the current version supports the latest CTL file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available Visual Basic update.
To make sure that your CTL file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .CTL file online - secure, fast, and no downloads needed.