KOHook

Simple hooking system.

Build

Steps to build:

1. Install Git
2. Install CMake
3. Install Visual Studio 2019
4. Open build.ps1 and change where your Ebenezer, AIServer and KnightOnline paths accordingly.
5. Open Developer Command Prompt for VS 19 and execute the following commands:

   powershell
   .\build.ps1

After the first execution of the script, you can use the KOHook.sln to build from there or debug.

How to use?

When the project is built, the DLLs are generated in the project's root directory -> build/bin.

Use CFF Explorer for each executable (AIServer.exe, Ebenezer.exe and KnightOnLine.exe) to add the exported functions of the custom DLLs into the executables' Import Table by following these steps:

1. Open CFF Explorer.
2. Drag the target executable into the GUI.
3. Click on Import Addr on the left pane and then click Add for adding a new module/dll.
4. Select the corresponding DLL for the loaded executable. e.g. AIServer.exe needs AIServer.dll.
5. In the Exported Functions pane select all of them and Import by Oridinal.
6. Final step is to click Rebuild Import Table and then Save.

If everything is done correctly, the modified executable should automatically load the custom DLL.

HINT: for development instead of copying the DLL, I simply create symbolic link to where the DLLs are compiled. e.g. for Ebenezer in the location where the executable is:

mklink Ebenezer.dll "D:\KOHook\build\bin\Ebenezer.dll"

Then every time recompilation takes place, it will use the latest version. The build.ps1 script already does that for you.