INFO: Limitations of WINOLDAP's Terminal Fonts
ID: Q117742
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The information in this article applies to:
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Microsoft Windows Software Development Kit (SDK) 3.1
SUMMARY
The MS-DOS prompt window (WINOLDAP) uses a set of private "Terminal" fonts.
Applications developed for the Windows Graphical Environment should not
rely on these fonts.
MORE INFORMATION
WINOLDAP uses Terminal-like fonts to present its output in the Enhanced
mode. The font resources are loaded when WINOLDAP is launched and are
removed when it terminates. To verify this, run a ChooseFont common dialog
box (such as the one in FONTEST sample in the SAMPLES directory of the
Windows 3.1 SDK) when WINOLDAP is not running. Launch WINOLDAP and notice
that "Terminal" fonts are added to the list of fonts in the common dialog
box.
Developers whose applications benefit from Terminal-like fonts may try to
use Terminal fonts out of convenience. However, it is important to realize
that these fonts (DOSAPP.fon, EGA40WOA.fon, EGA80WOA.fon, CGA40WOA.fon, AND
CGA80WOA.fon) are unlike the standard fonts in that they are shipped for
use by WINOLDAP. The standard Windows fonts are guaranteed to be available
in future versions of Windows; such guarantees do not apply to the Terminal
fonts. The Terminal fonts have actually been altered from version 3.0 to
version 3.1 of Microsoft Windows. A simple resolution to this lack of
guarantee is to ship the fonts along with the application. These fonts,
however, may not be shipped freely with third-party applications.
The paragraph above may lead you to believe that applications running
exclusively under Microsoft Windows version 3.1 can rely on the Terminal
fonts for the applications' displays because all Windows-based
applications, by default, have the above fonts installed. However, a bug in
WINOLDAP denies applications that benefit: When the last WINOLDAP session
exits, it removes the DOSAPP.FON module twice. Any application with the
DOSAPP.fon module loaded then loses the fonts without prior notice.
Additional query words:
3.10
Keywords : GdiFnt
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type : kbinfo