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Hooking functions allows you to replace a function value in an accessible environment by a function of your own, calling the original function before or after execution of new code. Hooking enables addons to modify and/or extend the behavior of the default UI and API. Depending on how the behavior of the original function is modified, one or more of three hook types may be used:

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  • Hooking functions
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  • Hooking functions allows you to replace a function value in an accessible environment by a function of your own, calling the original function before or after execution of new code. Hooking enables addons to modify and/or extend the behavior of the default UI and API. Depending on how the behavior of the original function is modified, one or more of three hook types may be used:
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abstract
  • Hooking functions allows you to replace a function value in an accessible environment by a function of your own, calling the original function before or after execution of new code. Hooking enables addons to modify and/or extend the behavior of the default UI and API. Depending on how the behavior of the original function is modified, one or more of three hook types may be used: Pre-hooks : New code executes before calling the original function, potentially choosing to modify the parameters passed to it, or not call it at all Post-hooks : New code executes after the original function, potentially using the original function's return values. Secure hooks : Certain functions require a secure execution path to operate correctly; in those cases, one may not replace the original function variable directly (as that would taint the variable and hence the execution path, preventing the original function from doing its job). In this case, a post-hook function can be applied using hooksecurefunc.
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