How to inject DLL before hooking about detours

[Arefu]

You use a DLL injector, either make one yourself or use one to download, there are plenty of examples on Google.

Here is an example (albeit shit) one https://github.com/Arefu/Wolf/tree/master/Embargo

[Dooskington]

You can also just inject with this library... that is part of what Detours does, and I have had lots of success doing so.

Take a look at the samples, specifically the trcapi one, which covers injection of a DLL into a process, then detouring something from within the process. Also take a look at the function DetourUpdateProcessWithDll().