LabelChartH Sub

 Action
 Prints a user-defined string horizontally on a chart.


 Syntax
 LabelChartH env, x%, y%, font%, color%, string$

 Remarks
 The LabelChartH procedure uses the following arguments.

 env
 ---
 A variable dimensioned as type ChartEnvironment.

 x%
 --
 An integer that indicates the left position of the first character, in
 pixels, relative to the chart window.

 y%
 --
 An integer that indicates the bottom of the first character, in pixels,
 relative to the chart window.

 font%
 -----
 An integer that contains the number of the font (in currently loaded list)
 to use.

 color%
 ------
 An integer that contains the color number in the chart palette used to
 assign color to the string.

 string$
 -------
 The text string to be printed.


 The LabelChartH procedure must be called after calling the charting sub.
 If an invalid font number (such as 0) is contained in font%, the first font
 loaded is used. If no fonts are loaded, the default font contained in the
 Presentation Graphics toolbox files is used.