post_message(_c)

	id.i4.v = post_message(top_row.i4.r, left_column.i4.r, text.i1a.r,
			       text_color.i4.r [,restore_mode.i4.r])

	id.i4.v = post_message_c(top_row.i4.v, left_column.i4.v, text.i1a.r,
				 text_color.i4.v [,restore_mode.i4.v]
				 [,max_line_len.i4.v])

	This routine will display a simple message window.  The text
	should be a null terminated string.  If there are embedded new
	line characters, a multiline message window will be created.
	Also, if the message is too long to fit on the screen, it will
	be broken up into muliple lines.  The message will remain until
	the window is deleted by a call to window_delete(_c).

	top_row		top row of window (use WMNGR_CENTER for centering
			or WINDOW_xxx_COORD macros in macro for special
			positioning)
	left_column	left column of window (use WMNGR_CENTER for centering
			or WINDOW_xxx_COORD macros in macro for special
			positioning)
	text		text string to be displayed (must be null terminated)
	text_color	text color
	[restore_mode]	optional argument which allows the programmer to
			choose the screen restore mode upon window deletion
			(WMNGR_REPAINT -> repaint underlying windows (default),
			 WMNGR_RESTORE_BKGND -> repaint obscured text,
			 CLIB_DEFAULT_ARG -> use the restore mode established
					     by the most recent call to
					     window_restore_hint_c)
	[max_line_len]	maximum line length
			(default is 0 which results in the window width
			 being limited by the size of the background window)

	This function returns status values as follows:

	CBS_WINDOW_TOO_BIG	message window won't fit on the TV screen
	otherwise		ID of message window

	This function requires the following include files:

	cbslib_h, macro_h, acnet_errors_h

	Related functions:

	post_multiline_message_c, timmes(_c), tvmess(_c), meswin(_c),
	window_delete(_c), window_restore_hint_c

	C/C++ usage:

	static const char	text[] = "This is a text message.";
	int	id;
	int	top_row = WMNGR_CENTER;
	int	left_column = WMNGR_CENTER;
	int	text_color = CYAN;
	int	restore_mode = CLIB_DEFAULT_ARG;
	int	max_line_len = 0;

	id = post_message_c(top_row,left_column,text,text_color,restore_mode,
			    max_line_len);
		.
		.
		.
	window_delete_c((short) id,WMNGR_LEAVE_CURSOR,0);