virtual joystick driver (VJoyD) and Direct Input

I have couple of questions:

1. What is exactly VJoyD used for? Based on my reading win WDK (Windows Driver Kit) it provides joystick services in Windows (http://msdn.microsoft.com/en-us/library/ff542258(v=vs.85).as开发者_如何学运维px). If that is the case, can I use it to send commands from my hardware to Vjoyd so my hardware can look like a joystick?

2. Direct Input is used mostly to read input devices but I want to do the opposite, I would like to write data to direct input so that it becomes availabe in video games, ie. have custom hardware translate information to Direct Input so it is like a joystick. There's in WDK (dinputd.h), is that what you would use? Any examples would be much helpful, even if it is one-liner to sent input axis value to DInput.

Btw, I am aware of PPJoy but not going to use it because this is for commercial use.

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Answering my own questions for the benefit of others:

1.A: VJoyD used by old version of OS to handle joystick input, dead by now.

2.A: In the past, you there were some alternatives but now replaced by HID class.