num_popup.i4.v = window_num_popup_windows()

	This routine returns the number of popup windows which are presently
	in existence.  Popup windows are those which have the restore screen
	mode of WMNGR_RESTORE_BACKGROUND or have been labelled as a popup
	window with the routine window_set_popup_c.

	This function returns status values as follows:

	number of popup windows

	This function requires the following include files:


	Related functions:

	window_construct(_c), window_set_popup_c, intro_tv_windows

	C/C++ usage:

	int	num_popups;

	num_popups = window_num_popup_windows();