Using WH_MOUSE_LL as C# recording, and sendinput to send, how can I uses the outputs to send?

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C#

Windows

I have an

HookMouseCallback(int nCode, IntPtr wParam, IntPtr lParam)

How do I use these out params in

UINT SendInput(
  [in] UINT    cInputs,
  [in] LPINPUT pInputs,
  [in] int     cbSize
);

I am also planning on doing this for keystrokes, but Im not sure how to.

What I have tried:

Well originally I wasn't using SendInput, I was using PostMessage or something, but it didn't give me the desired affect.

I think I want to use

HARDWAREINPUT

What the best way to do this?
Edit just found out HARDWAREINPUT isn't supported, what do I use now? I want to send it as the two params or at least from them.

I am trying to make a macro recorder, but I want more control over the outputs.