OScope__PlotTrace (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:oscope.h>
 *
 *    TOScope__Result OScope__PlotTrace( int channel, int dataCount,
 *                                       const TOScope__Data *traceData )
 *
 *  Function intent:
 *    OScope__PlotTrace() plots a specified number of data points from
 *    an X data array against time with a specified display color.
 *  Function parameters:
 *    int               channel         Channel number to plot
 *    int               dataCount       Number of points to plot
 *    TOScope__Data  traceData[]     trace data array
 *  Function return value:
 *    CBS_OK            success
 *    CBS_NOSETUP       OScope__DisplayScreen() not yet called
 *    CBS_RANGE         channel number out of range
 *    else              wn_xxx() function error occured