XYGraph__DisplayGraph (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:xygraph.h>
 *
 *    TXYGraph__Result XYGraph__DisplayGraph( const char *graphTitle,
 *					      const char *xLabel,
 *					      const char *yLabel,
 *					      TXYGraph__Data xMinimum,
 *					      TXYGraph__Data yMinimum,
 *					      TXYGraph__Data xMaximum,
 *					      TXYGraph__Data yMaximum )
 *
 *  Function intent:
 *    XYGraph__DisplayGraph() creates the X-Y graph with the requested features
 *    and displays it on the graphic display device.  XYGraph__DisplayGraph()
 *    should be called after XYGraph__Initialize() and any calls to
 *    XYGraph__EnableAnnotation() or XYGraph__EnableCoordinates().
 *  Function parameters:
 *    char		*graphTitle	pointer to X-Y graph title\subtitle string
 *    char		*xLabel		pointer to X axis label string
 *    char		*yLabel		pointer to Y axis label string
 *    TXYGraph__Data	xMinimum	X-Y Graph domain and range specification
 *    TXYGraph__Data	yMinimum			"
 *    TXYGraph__Data	xMaximum			"
 *    TXYGraph__Data	yMaximum			"
 *  Function return value:
 *    CBS_OK	success
 *    ~CBS_OK	XYGraph__DisplayGraph() already called
 *    else 	wn_xxx() function error occured