status.i4.v = window_key_case_c(key_case.i4.v)

	This routine sets the case for characters typed in by the user.
	It also returns the the previous setting.

	key_case	case for typed characters
			(WMNGR_UPPER_CASE -> upper case only,
			 WMNGR_MIXED_CASE -> allow upper and lower case,
			 CLIB_DEFAULT -> don't change the case (read only))

	This function returns status values as follows:

	CBS_MEMFAIL		dynamic memory allocation failure
	CBS_INVARG		invalid key case value passed
	WMNGR_UPPER_CASE	only upper case characters were allowed
	WMNGR_MIXED_CASE	both upper and lower case characters allowed

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	window_key_color_c, window_key_echo_c, intro_tv_windows

	C/C++ usage:

	int	status;
	int	key_case = WMNGR_MIXED_CASE;

	status = window_key_case_c(key_case);