.CHART SET BG COLOR

This subroutine sets the background color of the "current" chart spec.

Usage:

      PASS         <color_spec_name>          FIELD            SHARE? N
      *        OR
      PASS         <color_value>              FIELD            SHARE? N
      GOSUB    CHT .CHART SET BG COLOR
      *        Check for error
      IF       CHT .CHART SET BG COLOR        NE

Description:

This subroutine set the background color of the chart area for the "current" chart spec. This routine receives a single, optional value specifying either a <color_spec_name> or a <color_value>.

If a parameter is not received, then the background color of the chart spec is cleared and the default background color will be rendered.

If a parameter is received, the system first assumes that the value received is a <color_spec_name> and checks to see if a color spec record has been previously initialized with that name. If a color spec record is found, then that color spec record is used to create a color spec for the background color. If a color spec record is not found, then the system assumes that the value received is a literal <color_value> and uses the specified color to create a color spec for the background color.

After setting the background color, the background color spec becomes the "current" color spec.

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-- SteveFrizzell - 2010-03-18