num_switch.i4.v = window_has_switch_c(window_id.i2.v)

	This routine will return the number of switches presently defined
	for a given window.

	window_id	window ID (use WMNGR_BACKGROUND for background window)

	This function returns status values as follows:

	CBS_NO_SUCH		window is not registered with switch manager
	otherwise		number of switches defined for this window

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	switch_create_c, switch_create_radio_c, switch_delete_c,
	switch_window_delete_c, wn_window_has_switch_c, switch_get_info_c

	C/C++ usage:

	short	window_id;
	int	num_switch;

	num_switch = window_has_switch_c(window_id);