How to replace and call a function if I know the address of the target?

[oovm]

I successfully injected the dll, but I don't know how to replace the function with my version based on the address (module offset) and call it.

The table decompiled by others shows relative addresses, but rust calls seem to be based on raw addresses.

In almost all cases, an error (exit code: 0xc0000005, STATUS_ACCESS_VIOLATION) will be reported

unsafe {
    let f: extern "fastcall" fn() -> bool = unsafe { std::mem::transmute(0x4E as *const ()) };
    f() // (exit code: 0xc0000005, STATUS_ACCESS_VIOLATION)
}

[OpenByteDev]

Take a look at my other repository BurntSushi, where i do just that to block ads in Spotify.
The hooks are defined here.

[oovm]

dumpbin /exports <dll> + GetProcAddress + retour is indeed a good method.

But a game I encountered needs to hook functions in exe. In this case, there is no export name, only an offset table compiled by others.