Windows 3.1 SYSTEM.INI [NonWindowsApp] Section

• Microsoft Windows operating system versions 3.1, 3.11

SUMMARY

The information contained in this article is taken from the SYSINI.WRI file contained in the Microsoft Windows Resource Kit for the Windows operating system version 3.1. The SYSINI.WRI file may be viewed with Windows Write.

The [NonWindowsApp] section of the SYSTEM.INI file contains settings that affect the performance non-Windows applications.

MORE INFORMATION

The [NonWindowsApp] section can contain the following settings: ____________________________________________________________

CommandEnvSize=<bytes>

Default: 0 with MS-DOS versions earlier than 3.2.

          Otherwise, the value for the /e: parameter in the
          shell= command line in the CONFIG.SYS file.

          Note that running batch files with the extension
          .BAT starts COMMAND.COM, so this setting also
          applies to batch files. The value for this setting
          must be either 0, or between 160 and 32768. A
          value of 0 disables this setting. If the value is
          not valid, it will be rounded up to 160 or down to
          32768. If the value is less than the current size
          of the actual environment, this setting will be
          disabled, as if it were set to 0. If you have
          specified the environment size in a PIF file for
          COMMAND.COM, the PIF file setting overrides this
          setting.

DisablePositionSave=<Boolean>

Default: 0 Purpose: When disabled, the position and font used in a

          non-Windows applications is saved in the
          DOSAPP.INI file when you quit the application. If
          enabled, the position and fonts used by a non-
          Windows application whose settings have not been
          previously saved in the DOSAPP.INI file will not
          be saved. If enabled, the setting can be
          overridden for each non-Windows application by
          selecting the Save Settings On Exit check box in
          the Font dialog box.

FontChangeEnable=<Boolean>

Default: 1 on systems that use Windows 3.1 grabbers. 0 on

          systems that use Windows 3.00 grabbers

          running non-Windows applications in a window on
          systems that use version 3.00 of the grabbers
          (usually 3.00 display drivers). Windows version 3.1
          of the video grabbers (used in 3.1 display
          drivers) include built-in support for changing
          fonts when running non-Windows applications in a
          Window. If you are using a 3.00 grabber that has
          not been updated to include the ability to change
          fonts and you want to use this feature, enable
          this setting. However, with this setting enabled,
          your screen may lose characters and the cursor may
          change size and positition slightly.

GlobalHeapSize=<kilobytes>

Default: 0 Purpose: Specifies the size of a buffer in conventional

          memory that Windows allocates when running in
          standard mode. This buffer can be used to share
          information among all non-Windows applications
          that are started from Windows. This setting has no
          effect when Windows is running in 386 enhanced
          mode.

            should never need to change this setting.)

LocalTSRs=<list-of-TSR-applications>

Default: DOSedit, ced Purpose: Specifies which terminate-and-stay-resident (TSR)

          programs work properly if they are copied to each
          instance of a virtual machine. When you start
          Windows, it detects any TSR programs that are
          currently running. If the TSR is on the LocalTSRs
          list, Windows will place a copy of the TSR in each
          virtual machine you run. Many TSR's will not run
          properly if they are added to this list. Make sure
          your TSR is fully compatible with Windows and can
          be copied to a virtual machine before adding it to
          the list.

MouseInDOSBox=<Boolean>

Default: 1 if an MS-DOS mouse driver with the extension

          .COM or .SYS that supports the use of a mouse with
          a non-Windows application is loaded. Oherwise, the
          default is 0.

          running a non-Windows application in a window.
          Mouse support for non-Windows applications running
          in a window is automatically available if you are
          using a Windows 3.1 version of the grabbers. If
          you are using a Windows 3.00 version of the
          grabbers and you want mouse support, enable this
          setting. If you do not want mouse support, disable
          this setting.

NetAsynchSwitching=<0-or-1>

Default: 0, unless an application is running that supports

          the use of the Task Switcher API by the NETBIOS.

          an application (running in standard mode) after it
          has made an asynchronous network BIOS call. If
          disabled, you cannot switch away from an
          application after it has made an asynchronous
          network BIOS call. Switching away from some
          applications that make  these calls might cause
          your system to fail. Once Windows detects an
          asynchronous NetBIOS call, you cannont switch away
          from the application, even if no more of these
          calls are made. Enable this setting if you are
          sure that the applications you use will not
          receive network messages while they are inactive.

ScreenLines=<number>

Default: 25 Purpose: Specifies the number of lines that will be

          displayed on the screen when running a non-Windows
          application. An application that specifies a
          different screen mode can override this setting.

SwapDisk=<drive-colon-directory>

Default: The directory pointed to by the TEMP environment

          variable; if there is no TEMP variable, then the
          default is the root directory of your first hard
          drive (usually labeled C:). If you do not have a
          hard disk, then the default is the root directory
          of your first floppy drive (usually labeled A:).

          to which Windows running in standard mode swaps
          non-Windows applications.

Reference(s):

Microsoft Windows Resource Kit 3.1 SYSINI.WRI file