provides functions that control the low-level graphics and allow
direct access to the AutoCAD graphics screen and input devices.
grtext function displays text
directly in the status or menu areas, with or without highlighting.
The grdraw function draws a vector in
the current viewport with control over color and highlighting. The
grvecs function draws multiple
functions depend on code in AutoCAD, their operation can be
expected to change from release to release. There is no guarantee
that applications calling these functions will be upward
compatible. Also, they depend on current hardware configurations.
In particular, applications that call grtext are not likely to work the
same on all configurations unless the developer is very careful to
use them as described (see the Customization
Guide) and to avoid hardware-specific features. Finally,
because they are low-level functions, they do almost no error
reporting and can alter the graphics screen display unexpectedly
(see the following example for a way to fix this).
sequence restores the default graphics window display caused by
incorrect calls to grtext, grdraw, or