find_change

	status.i4.v = find_change(top_row.i2.r, left_column.i2.r,
				  max_length.i2.r, find_routine.f.v,
				  change_routine.f.v, information.s.r)

	This function creates and manages a "find/change" window on the TV
	screen.  See the Lumberjack Devices page (PA0758 mapped to D43) for
	an example.

	The standard window size is 13 rows X 30 columns. If maxlen is longer 
	than 30 characters (but not over 74) the window will be automatically 
	sized by the function.
	
	This function is intended to be used with programs that use window
	manager functions exclusively.
	
	top_row		upper row where the find/change window should be 
			initially placed
	left_column	left column where the find/change window should be
			initially placed
	max_length	maximum length of find/change string (maximum is 74)
	find_routine	the address of the programmer provided function that
			implements find
			(The find routine will be called by this function with
			 one argument: a pointer to a structure.  See below.
			 For a function to match strings containing wild card
			 characters in the find_routine, see description of 
			 str_wmatch_search.)
	change_routine	the address of the programmer provided function that 
			implements change
			(The change routine will be called by this function with
			 one argument: a pointer to a structure.  See below.
			 For a function that will modify a candidate string for
			 the change routine, see str_replace.)
	information	programmer provided structure to share find/change
			information between this and the user's routines
			(structure of type FIND_CHANGE_DATA)

	This function returns ACNET status values as follows:

	OK			success
	CLIB_INVARG		invalid string length passed

	This function requires the following include files:

	cbslib_h, cns_data_structs_h

	Related functions:

	str_replace, str_wmatch_search

	C/C++ usage:

	short	top_row = 2;
	short	left_column = 1;
	short	max_length = 20;
	void	find_routine(void);
	void	change_routine(void);
	FIND_CHANGE_DATA	information;

	status = find_change(&top_row,&left_column,&max_length,
			     find_routine,change_routine,&information);