DirectInput Hooking Question

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DirectX

Hello,

I leveraged the hook code from here
Hooking a DirectX/COM Interface[^]

It has been great, but I have a question.

Am I required to hook "all" the functions to make it actually fully work?

I merely took it as-is and hooked it into a good that I play to see if it was using GetDeviceState, which it is.

However the game crashes and or hangs if I use the hook (it does load I etc but fails shortly after).

I don't know if it's merely releasing and re-acquiring and the code doesn't handle that well, OR if it's a problem that I haven't implemented all the functions on the device interface.

Am I required to actually implement them all? (even if all it is is a call to the original function through the original device pointer?)

Thanks