OScope__SetPlotType (ul_pbar_graphics)

 *  Synopsis:
 *    #include <ul_pbar_graphics:oscope.h>
 *
 *    TOScope__Result OScope__SetPlotType( int type )
 *
 *  Function intent:
 *    OScope__SetPlotType() allows the user to set the type of X-Y graph
 *    displayed by OScope__DisplayScreen().  The routine allows selection
 *    between linear, log base ten and log base e for both X and Y axes.
 *  Function parameters:
 *    type      graph type code(s) values may be ored together as required:
 *                WN_SCALE_LINEAR_BOTH
 *                WN_X_SCALE_LINEAR
 *                WN_X_SCALE_LOG10
 *                WN_X_SCALE_NATURAL_LOG
 *                WN_Y_SCALE_LINEAR
 *                WN_Y_SCALE_LOG10
 *                WN_Y_SCALE_NATURAL_LOG
 *  Function return value:
 *    CBS_OK    success
 *    ~CBS_OK   OScope__DisplayScreen() already called