Registry Tree Structure

OS/2 defines the base set of persistent keys in the DOS branch of the name space, hanging off WINOS2 node. The root of these registry keys is called winreg. Beneath winreg, the following structure exists:

winreg (root)  ---
                  |
                  |-- REGH_WINOS2INI
                  |                  |--- WIN.INI
                  |                                |- WINI_FONTS
                  |                                |- WINI_INTL
                  |                                |- WINI_DEVICES
                  |                                |- WINI_WINDOWS
                  |                  |--- xxxxxxxxx (application ini file name)
                  |
                  |-- REGH_SYSINFO
                  |              |--TIME
                  |                 |- TIME_SETTING
                  |
                  |
                  --- REGH_INIMAPPING (All mappings take place
                                       under REGH_WINOS2INI directory)
                               |----WIN.INI
                                            (contains value name "FONTS"
                                             with value "WIN.INI\WINI_INTL")
                                            (contains value name "DEVICES"
                                             with value "WIN.INI\WINI_DEVICES")
                                            (contains value name "WINDOWS"
                                             with value "WIN.INI\WINI_WINDOWS")

winreg is a name space node, not accessible through Windows 32-bit registry functions. In addition to actual key handles, you can use the following as input handles to Windows 32-bit registry functions:

• REGH_WINOS2INI
  
• REGH_SYSINFO
  
• REGH_INIMAPPING

They are defined in os2win.h.

The following describes the subdirectories in the tree:

REGH_WINOSINI

Contains the supported system INI keys as well as application INI data. All node names are:

• Case-insensitive 
  Converted to uppercase
  All attribute names are:

  • Case-insensitive
    
  • Converted to uppercase, except for value names under WINI_FONTS, WINI_INTL, and WINI_DEVICES
  Values for WINI_FONTS, WINI_INTL, and WINI_DEVICES are obtained from OS2.INI and so maintain the case-sensitive quality.

  There is only one value contained in WINI_WINDOWS: the default printer device (value name device).

REGH_SYSINFO
Contains any system information. For now, the only data stored under this branch is time-related information, such as time bias, standard bias, daylight bias, and so on. The information is used by Windows time-related functions.
REGH_INIMAPPING
Contains INI file mapping information.

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