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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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The standard-mode display grabber is a binary-image file consisting of a set
of functions that provide display-dependent services. Windows loads a
grabber whenever the user runs a non-Windows application. The 286grabber
setting in the [Boot] section of the SYSTEM.INI file specifies which
standard-mode grabber to load.
 
Windows calls grabber functions to set the display mode and to retrieve
information Windows needs to save and restore the video context for
non-Windows applications. When the user switches away or back to an
application, Windows calls other grabber functions to save or restore the
video context for that application.
 
A display grabber has the following components:
 
♦  Standard functions
 
♦  Extended functions
 
♦  Standard and extended-function dispatch tables
 
♦  Coordinate system
 
 
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