tvcolr(row.u1.r, column.u1.r, num_chars.i2.r [,fcolor.i1.r] 
	       [,bcolor.i1.r] [,blink.i1.r])

	tvcolr_c(row.i4.v, column.i4.v, num_chars.i4.v [,colors.i4.v])

	This routine will change the display attributes (color and blink) of
	NUM_CHARS characters on the color TV starting at row = ROW, column =
	COLUMN. FCOLOR, BCOLOR, and BLINK are optional integer arguments which
	contain the foreground color code, background color code, and blink 
	code respectively. See the description of the TVM routine for 
	definitions of these codes and their defaults.

	This function requires the following include files:


	Related functions:

	window_text_color(_c), btvcolr(_c)