What is a .H1S file?
The .H1S file extension refers to a Windows Assistance Platform Help File. This type of file is a compiled help document that was first introduced with the Windows Vista operating system and is also supported in Windows 7. These files are primarily used by Microsoft and Original Equipment Manufacturers (OEMs) to create help documents for the operating system. However, third-party software developers generally do not use this format for their help documents.
The .H1S files are operated by a program called the Assistance Platform client, commonly known as HelpPane.exe. This program is automatically installed with Windows, so users do not need to install any additional software to open .H1S files.
If you need to open a .H1S file, you can simply use the Microsoft Assistance Platform, which is included with the Windows operating system. You can find several pre-installed .H1S files in the directory C:\Windows\Help\Windows\en-US\.
For those who need to work with .H1S files beyond just opening them, these files can be compiled using a program called Apcompnt.exe, which is included with the Assistance Platform Help Compiler. Additionally, if there is a need to decompile these files, the tool xHelpMarkup can be used.
In summary, .H1S files are help documents used by Windows, managed by the HelpPane.exe program, and do not require any additional software to be opened if you are using a compatible version of Windows.
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