NAME
	LockPubScreenList -- Prevent changes to the system list. (V36)

    SYNOPSIS
	List = LockPubScreenList()
	D0

	struct List *LockPubScreenList( VOID );

    FUNCTION
	Arbitrates access to public screen list	while you quickly
	make a copy of it for display to the user.

	Note that this is intended only for the Public Screen Manager
	program.

    NOTES
	The nodes on the list are PubScreenNode structures.
	Act quickly while holding this lock.  The restrictions
	on LockIBase() apply here as well.

    INPUTS
	None.

    RESULT
	A pointer to the public screen list.

    BUGS

    SEE ALSO
	UnlockPubScreenList(), OpenScreen(), Intuition V36 update documentation