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.hlp

File Type Windows Help File IconWindows Help File
File Format Proprietary (Microsoft)
Usage Open manually; may be referenced by an application
Popularity ★ ★ ★ ★ ☆  Common
Description

Contains documentation for the Windows operating system or Windows programs; compiled using Microsoft Help Workshop (HCW.exe); can be viewed with the Windows Help Viewer, which is integrated into the Windows operating system.

Open With
Windows

IconAdobe RoboHelp

IconMicrosoft Windows Help Viewer

IconHelp Explorer Viewer

macOS

IconAdobe RoboHelp

Unix

IconHelp Explorer Viewer

Published 2007
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Information from the PC File Extensions Reference
https://pc.net/extensions/hlp
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