XYGraph__AnnotateText (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:xygraph.h>
 *
 *    TXYGraph__Result XYGraph__AnnotateText( int row, int col,
 *					      const char *text, int color )
 *
 *  Function intent:
 *    Write a text string to Annotation Window at a specified [row, col] in a
 *    specified color.
 *  Function parameters:
 *    int	row	annotation window row at which to display text
 *    int	col	annotation window column at which to display text
 *    char	*text	pointer to the text string to display
 *    int	color	color with which the text string is displayed
 *  Function return value:
 *    CBS_OK		success
 *    CBS_NOSETUP	XYGraph__EnableAnnotation() has not been called
 *    else 		wn_xxx() function error occured