status.i4.v = slider_read_c(slider_id.i4.v, value.r4.r)

	This routine returns the current value for a slider created by an
	earlier call to slider_create_c.

	slider_id	ID of slider (returned from a prior call to
	value		returned current slider value

	This function returns ACNET status values as follows:

	OK			success
	CBS_NO_SUCH		slider does not exist

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	slider_set_c, slider_get_values_c, slider_set_values_c,
	slider_create_c, slider_delete_c, slider_update_c, slider_was_moved

	C/C++ usage:

	int	status;
	int	slider_id;
	float	value;

	status = slider_read_c(slider_id,&value);