These functions allow the safe hooking of windows functions,
specifically windows API functions that may or may not have built-in
machine code to help aid in reverse chain hooks.
If a new hook is applied to an existing forward hook, that hook will be
preserved to prevent that new hook's data from being removed
unintentionally.
Hopefully with all these precautions this will reduce the likelihood of
crashes and abnormal hook behavior, while allowing existing hooks to be
preserved, and allowing new hooks to be applied.
jp9000