Presentation Graphics Toolbox


 The first part of this section describes the SUB and FUNCTION procedures
 that are supported by the Presentation Graphics toolbox. The second part
 describes the SUB and FUNCTION procedures that are supported by the Fonts
 toolbox. The Fonts toolbox can be used with the Presentation Graphics
 toolbox or independently to draw graphics text.

 The Presentation Graphics toolbox (CHRTB.BAS), included with the BASIC 7.0
 Compiler, contains a set of routines for defining, analyzing, and printing
 charts on the screen.

 There are five kinds of charts, each available in two styles as shown here.

 Style    Bar        Column    Line            Scatter        Pie

 1        Plain      Plain     Lines and       Lines and      Percent
                                  points         points         displayed
 2        Stacked    Stacked   Points only     Points only    No percent

 To use the toolbox, you first must declare the dimensions for a variable as
 the user-defined type ChartEnvironment. The definition for this type is
 found in the CHRTB.BI header file. This file also contains definitions for
 constants that can be used as arguments to the procedures described in this
 section. Using these constants in place of hand-coded numerics will make
 your program cleaner and easier to debug.