Graphics4VO is developed for use with CA-Visual
Objects (Version 2.0 upto 2.8). It is based on 32-Bit-
WINDOWS-API. The library allows development of
graphics oriented CA-Visual Objects applications for
32-Bit Windows operating systems. The Graphics Library
Graphics4VO includes classes, methods and functions
for integration of graphic elements into Windows
applications. It could be used to add graphics to
existing applications with minimum labor, or for new
development. Knowledge of Windows graphics handling or
of Windows API-programming is not required. With the
graphics library Graphics4VO various graphics output
on the screen, to the printer, to the plotter, into
the file and on memory bitmaps are possible. Beside
elementary pixel graphics and graphic primitives a lot
of business and presentation graphics is provided such
as bar charts, pie charts or line charts, mathematical
coordinate systems, function graphs and fractals in a
simple way. Beyond that graphics from other programs
or scanned pictures in files with different graphics
formats or ArcView shapes can be imported into the own
application. Efficient coordinate transformations into
world coordinate systems save the conversion work and
guarantee the uniform representation on different
devices. The GUI classes made available by CA-Visual
Objects receive ability to graphic representation by
Graphics4VO. The implementation of graphics into
existing programs is very simple therefore to
accomplish. The Library is based upon a very fast
graphics display mechanism that allows an
exceptionally quick screen drawing. Repainting of an
uncovered window is performed from an internal image-
bitmap at a speed that makes it not noticeable to the
eye. There is no need for the subsequent
reconstruction of graphics. Classes, methods and
functions for producing graphic output in user
applications are available with declarations in both
English and German language in the source headers and
in the documentation.

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