XYGraph__GetAnnotationSize (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:xygraph.h>
 *
 *    TXYGraph__Result XYGraph__GetAnnotationSize( int *rows, int *columns )
 *
 *  Function intent:
 *    Return the number of rows and collumns of text can be displayed in the
 *    annotation window.
 *  Function parameters:
 *    int	*rows		number of annotation window rows
 *    int	*columns	number of annotation window columns
 *    int	size		requested character size
 *  Function return value:
 *    CBS_OK		success
 *    CBS_NOSETUP	XYGraph__EnableAnnotation() has not been called
 *    else 		wn_xxx() function error occured