OScope__GetChanAnnotationSize (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:oscope.h>
 *
 *    TOScope__Result OScope__GetChanAnnotationSize( int channel, int *rows,
 *                                                   int *columns )
 *
 *  Function intent:
 *    Return the number of rows and collumns of text that can be displayed in
 *    the specified channel window.
 *  Function parameters:
 *    int       channel         channel number
 *    int       *rows           number of text rows
 *    int       *columns        number of text columns
 *    int       size            requested character size
 *  Function return value:
 *    CBS_OK            success
 *    CBS_NOSETUP       OScope__DisplayScreen() not called
 *    CBS_RANGE         channel number out of range
 *    else              wn_xxx() function error occured