.MSHC File Extension
File TypeMicrosoft Help Container File
What is an MSHC file?
Help package created in the MS Help Viewer 1.x format, which replaces the MS Help 2.x (.HXS) and MS Help 1.x (.CHM) formats; stores help content such as .HTML files, images, and written text; saved in a compressed .ZIP format.
MSHC files store help documents created for software applications. The documentation is deployed with software applications as a signed .CAB file that contains MSHC packages.