>> HM file

HM file format description

Many people share .hm files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .hm file can be edited, converted or printed with. On this page, we try to provide assistance for handling .hm files.

1 filename extension(s) found in our database.

.hm - WinHelp Context ID

The HM development files are related to Visual Studio. HM file is a Windows Help Context ID. Microsoft WinHelp is a proprietary format for online help files that can be displayed by the Microsoft Help browser winhelp.exe or winhlp32.exe. The file format is based on Rich Text Format (RTF). It remained a popular Help platform from Windows 3.0 platform through Windows XP. WinHelp was removed in Windows Vista to discourage software developers from using the obsolete format and encourage use of newer help formats.

Visual Studio
Development files
- / -
WinHelp Context ID related extensions:
Visual Studio Enterprise Template Object
Visual Studio No Compile Browse File
Visual Studio .NET Web Information Data
Visual C# .NET Class
Windows Script File
Windows CE Embedded Rom Image

Naturally, other applications may also use the .hm file extension. Even harmful programs can create .hm files. Be especially cautious with .hm files coming from an unknown source!

Can't open a .hm file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .hm file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

gm, ym, tm, mm, jm, hk, hh, um, nm, mh, hl, hj

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Autologic Bitmap Image
Catalyst Translation Memory Data
Teli Fax Image
HTML Help Header File
The Land of UM Data
Matrix Market File

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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