key_clear_pressed_c

	status.i4.v = key_clear_pressed_c(key.u4.v, modifier.i4.v)

	This routine clears the status that the requested key has been pressed.
	This call must have been preceded by a call to key_press_init_c.

	key		key symbol to be cleared  (Use the value
			WMNGR_ALL_KEYS to monitor all key presses.)
			(constants are in X11/keysym)
	modifier	modifier to be cleared
			(WMNGR_NO_MODIFIER_MASK -> no modifier keys pressed,
			 WMNGR_SHIFT_MASK -> shift key pressed,
			 WMNGR_CTRL_MASK -> control key pressed,
			 WMNGR_ALT_MASK -> alt key pressed,
			 WMNGR_LOCK_MASK -> lock key pressed,
			 WMNGR_COMPOSE_MASK -> compose key pressed,
			 WMNGR_ALL_MODIFIER_MASK -> any or no modifier
						    keys pressed)

	This function returns status values as follows:

	OK			key press status cleared
	CBS_NO_CHANGE		key had not been pressed
	CBS_NOSETUP		key press request (key_press_init_c) has
				not been made
	CBS_MEMFAIL		error in allocating dynamic memory

	This function requires the following include files:

	cnsparam_h, cbslib_h, acnet_errors_h, X11/keysym.h

	Related functions:

	key_pressed_c, key_press_init_c, key_press_cancel_c

	C/C++ usage:

	int	status;
	int	modifier = WMNGR_CTRL_MASK;
	unsigned int	key = 'f';

	status = key_clear_pressed_c(key,modifier);