1	SUB SMG_BOX(LONG Top_left_row,LONG Top_left_col,LONG Bottom_right_row,&
		LONG Bottom_right_col,LONG Rendition,LONG Vir_disp_num)

	!---------------------------------------------------------------&
	!								&
	!		   	    SMG_BOX				&
	!								&
	!		Creation Date:  3-July-1985			&
	!		Author:		Ken Messer			&
	! 		Purpose:        Draw a rectangle of specified	&
	!				size on a virtual display	&
	!								&
	!		Modification history				&
	!								&
	!	Date	Description of change(s)			&
	!								&
	!---------------------------------------------------------------&
	!								&
	! Copyright (c) 1985 -	Ken Messer, Allied Electronics, Inc.,	&
	!			401 E. 8th St., Ft. Worth, TX  76102	&
	!								&
	! This software may be copied and distributed freely to anyone	&
	! for non-commerical use provided that this copyright notice is &
	! included.							&
	!---------------------------------------------------------------&

	OPTION TYPE = INTEGER, SIZE = INTEGER LONG

	%include "SMG$LIBRARY:SMG.DFN"


	EXTERNAL LONG FUNCTION		SMG$Draw_rectangle

	EXTERNAL LONG CONSTANT		SS$_Normal,			&
					SMG$M_Blink,			&
					SMG$M_Bold,			&
					SMG$M_Reverse,			&
					SMG$M_Underline

	DECLARE LONG 			Return_status,			&
					Rendition_set,			&
					Rendition_comp

	EXTERNAL STRING FUNCTION	Get_Error_Message(LONG)

	!---------------------------------------------------------------&
	!								&
	!		M a i n   P r o g r a m   L o g i c		&
	!								&
	!---------------------------------------------------------------&

	Rendition_set, Rendition_comp = 0

	! Test the rendition mask and set the specified video attributes

	Rendition_set = Rendition_set OR SMG$M_Blink	   IF Rendition AND 1
	Rendition_set = Rendition_set OR SMG$M_Bold	   IF Rendition AND 2
	Rendition_set = Rendition_set OR SMG$M_Reverse	   IF Rendition AND 4
	Rendition_set = Rendition_set OR SMG$M_Underline   IF Rendition AND 8

	Rendition_comp = Rendition_comp OR SMG$M_Blink	   IF Rendition AND 16
	Rendition_comp = Rendition_comp OR SMG$M_Bold	   IF Rendition AND 32
	Rendition_comp = Rendition_comp OR SMG$M_Reverse   IF Rendition AND 64
	Rendition_comp = Rendition_comp OR SMG$M_Underline IF Rendition AND 128

	! Draw the box

	Return_status = SMG$Draw_rectangle(Display_id(vir_disp_num),	&
	   Top_left_row, Top_left_col,Bottom_right_row,Bottom_right_col,&
	   Rendition_set,Rendition_comp)

	! Check for error

	IF Return_status AND SS$_Normal = 0   THEN
		PRINT Get_Error_Message(Return_status)
		STOP
	END IF

	SUBEXIT

	END SUB