MakeChartPattern$ FUNCTION

 Action
 Changes fill pattern and color.


 Syntax
 MakeChartPattern$(refPattern$, foreground%, background%)

 Remarks
 The MakeChartPatern$ and GetPattern$ procedures are used in combination with
 the GetPaletteDef and SetPaletteDef procedures to change the fill pattern
 for pie, column, and bar charts.

 The GetPattern$ procedure uses the following arguments.

 refPattern$    A string representing the pixel pattern.
 foreground%    Attribute to map to the pixels in refPattern$ that are
 defined as being on.
 background%    Attribute to map to the pixels in refPattern$ that are
 defined as off.

 Note that if foreground% and background% are the same value, the fill
 pattern appears as a solid color.
 Constructing a value for refPattern$ is difficult. When using the
 Presentation Graphics toolbox, you can simplify the process by using the
 GetPattern$ procedure to choose an internally-defined pattern.
 MakeChartPattern$ maps colors to the string returned by GetPattern$ to
 produce the combination of color and pattern you want. For more information,
 see the entry for the GetPattern$ procedure earlier in this section.