Unit 'exec'	Package
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Setfunction

Change a function vector in a library

Declaration

Source position: exec.pas line 1849

function Setfunction(

Lib: PLibrary;

FuncOffset: LongInt;

const Newfunction: Pointer

):Pointer;

Arguments

`Lib`		A pointer to the library to be changed
`FuncOffset`		The offset of the function to be replaced
`Newfunction`		A Pointer to new function

Function result

Pointer to the old function that was just replaced

Description

SetFunction is a functional way of changing where vectors in a library point. They are changed in such a way that the checksumming process will never falsely declare a library to be invalid.

Warning

While it's more or less safe to patch a library vector with SetFunction() it's not possible to safely remove the patch later. So don't use this function if it can be avoided.