did_it.i4.v = window_draw_char_c(window_id.i2.v, row.i4.v, column.i4.v,
					 character.i1.v, color.i4.v)

	This routine will write a single character to a window.

	window_id	window ID (use WMNGR_BACKGROUND for background window)
	row, column	window coordinate location
	character	character to write  (Note: Special graphics character
			constants can be found in 'extchrset'.)
	color		display color  (If a background color other than
			black is desired, a compound color value can be
			constructed using tv_colors or TV_COLORS_WBLINK.)
			(constants are in 'cnsparam')

	This function returns status values as follows:

	TRUE			window I/O actually done
	FALSE			no window I/O done

	This function requires the following include files:

	cnsparam_h, cbslib_h, extchrset_h

	Related functions:

	window_tvm(_c), window_tvmx(_c), window_write_string_c, tv_colors,
	TV_COLORS_WBLINK, intro_tv_windows

	C/C++ usage:

	char	character = SYMBOL_DIAMOND;
	short	window_id;
	int	did_it;
	int	row = 1;
	int	column = 1;
	int	color = WHITE;

	did_it = window_draw_char_c(window_id,row,column,character,color);