H File: What is it?

Written by:   |   Revised: December 05, 2018

Microsoft Silver

H File Summary

There are two file types associated with the H File Extension, with the most widely-observed being the C/C++/Objective-C Header File format. According to our database, twelve distinct software programs (conventionally, MacroMates TextMate developed by MacroMates) will enable you to view these files. The majority of H files are considered Developer Files, but they can also be Settings Files.

The H File Extension can be viewed on the Mac, Windows, and Linux operating systems. They are supported on both desktop and mobile devices. H files have a "Low" Popularity Rating; this means that they are not present on most devices.

If you would like to learn more about H files and the software that opens them, please see the additional detailed information below. Also, you can learn how to do some basic H file troubleshooting if you are having trouble opening these files.

Low
Prevalence
1728
Position

/ 11690

Active

Importance

5

December

2018

Edited

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Varieties of H Files

  2 known file types use this extension

Main H Affiliation

.H
File Name:.h
Classification:C/C++/Objective-C Header File

H file is a header file referenced by a C, C++ or Objective-C source code document. It may contain variables, constants, and functions that are used by other files within a programming project.

Company: The Eclipse Foundation
Group:Developer Files
Key: HKEY_CLASSES_ROOT\.h

Software Programs That Open The C/C++/Objective-C Header File:


MacroMates TextMate by MacroMates

Mac

Microsoft Visual Studio by Microsoft Corporation

Windows

gVim by Open Source

Windows

GNU Emacs by GNU Project

Windows
Mac
Linux
GNU

Dev-C++ by Bloodshed Software

Windows

Eclipse CDT by The Eclipse Foundation

Windows
Mac
Linux

GNU Compiler Collection (GCC) by GNU Project

Mac
Linux

MacVim by Open Source

Mac

Code::Blocks by The Code::Blocks team

Windows
Mac
Linux

Apple Xcode by Apple

Mac
iOS
OS X El Capitan

Borland C++ by Micro Focus International plc

Windows

Other H Descriptions

.H
File Name:.h
Classification:Miranda IM SmileyAdd Plugin File

H file extension is also used by Miranda plugin called SmileyAdd. Miranda is a popular instant messaging program.

Company: Miranda IM project
Group:Settings Files

Software Programs That Open Miranda IM SmileyAdd Plugin File Files:


Miranda IM by Miranda IM project

Compatible with:

Windows

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H Demand


Popular OS Rank

Windows 7 (48%)
Windows 10 (42%)
Windows 8.1 (5%)
Windows XP (2%)

Popular OS Rank

Windows (97.14%)
Macintosh (2.06%)
Linux (0.73%)
Chrome (0.05%)
Other (0.01%)


Troubleshooting Problems Opening H Files


Troubles Opening H Files

MacroMates TextMate Removed

You encounter an error message such as "%%os%% Can't Open H Files" when trying to open your H. Customarily, this means that MacroMates TextMate is not installed on %%os%%. The typical path of opening your H with a double-click won't work because %%os%% cannot make the program connection.


Tip: If you don't have MacroMates TextMate installed, and you know of another program to open your H file, you can try opening it by selecting from the programs listed under "Show Apps".


Outdated MacroMates TextMate

In other instances, your C/C++/Objective-C Header File file version may not be supported by your version of MacroMates TextMate. Visit the MacroMates website to download (or purchase) the latest version of MacroMates TextMate. Your C/C++/Objective-C Header File file was probably created by a newer release of MacroMates TextMate than what's currently installed your computer.


Tip: Find clues on the correct software version by right-clicking your H file and clicking "Properties".


Summary: In either case, the majority of problems opening H files are related to not having the correct software application installed on your computer.


Other Causes of H File Opening Problems

Errors opening C/C++/Objective-C Header File files can still occur even with the latest MacroMates TextMate software installed on your computer. There can be external issues inside of %%os%% that are causing these errors when opening Hs. Additional factors include:

  • Corrupt Windows Registry file path references for H
  • Unintentional removal of the description of the H file inside the Windows Registry
  • Corrupt install of MacroMates TextMate or other H-related program
  • File corruption affecting your H file
  • Malware-tainted H file can't be opened
  • Drivers associated with H software need to be updated
  • Too many applications are open on your PC to load your C/C++/Objective-C Header File file successfully

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