status.i4.v = wn_data_save(save_switch.i4.r)

	status.i4.v = wn_data_save_c(save_switch.i4.v)

	This routine sets the data save state for the active graphic window.

	save_switch	desired data save state
			(WN_DATA_SAVE_ON -> turn on data saving,
			 WN_DATA_SAVE_OFF -> turn off data saving,
			 WN_DATA_SAVE_CONT -> continue saving data,
			 CLIB_DEFAULT_ARG -> simply return current data
					     saving state)

	This function returns ACNET status values as follows:

	CBS_NOSETUP		an active window has not been established
	CBS_MEMFAIL		failed in allocating dynamic memory
	otherwise		previous data saving state

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	wn_data_set_cut_c, wn_data_mean, wn_data_extrema, wn_data_recall,
	wn_data_query, wn_data_polyfit_c, wn_data_fft_c, intro_graphics_windows

	C/C++ usage:

	int	status;
	int	save_switch = WN_DATA_SAVE_ON;

	status = wn_data_save_c(save_switch);