Automated updating of API pages at this location, to reflect patch changes, has ceased from 10.1.7 onwards.

Securely posthooks the specified function. The hook will be called with the same arguments after the original call is performed.

hooksecurefunc([table,] functionName, hookfunc)

Arguments

table

Optional Table - Table to hook the functionName key in; if omitted, defaults to the global table (_G).

functionName

string - name of the function being hooked.

hookfunc

function - your hook function.

Example

The following calls hook CastSpellByName and GameTooltip:SetUnitBuff without compromising their secure status. When those functions are called, the hook prints their argument list into the default chat frame.

hooksecurefunc("CastSpellByName", print); -- Hooks the global CastSpellByName
hooksecurefunc(GameTooltip, "SetUnitBuff", print); -- Hooks GameTooltip.SetUnitBuff

Details

• This is the only safe way to hook functions that execute protected functionality.
• hookfunc is invoked after the original function, and receives the same parameters; return values from hookfunc are discarded.
• After this function is used on a function, setfenv() throws an error when attempted on that function
• You cannot "unhook" a function that is hooked with this function except by a UI reload. Calling hooksecurefunc() multiple times only adds more hooks to be called.
• Also note that using hooksecurefunc() may not always produce the expected result. Keep in mind that it actually replaces the original function with a new one (the function reference changes). For example, if you try to hook the global function "MacroFrame_OnHide" (after the macro frame has been displayed), your function will not be called when the macro frame is closed. It's simply because in Blizzard_MacroUI.xml the OnHide function call is registered like this:

<OnHide function="MacroFrame_OnHide"/>

The function ID called when the frame is hidden is the former one, before you hooked "MacroFrame_OnHide". The workaround is to hook a function called by "MacroFrame_OnHide":

hooksecurefunc(MacroPopupFrame, "Hide", MyFunction)

• If you want to securely hook a frame's script handler, use Frame:HookScript:

MacroPopupFrame:HookScript("OnHide", MyFunction)

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