I'm not sure exactly what you're asking here. Are you looking for app-specific (ie. Mame Hooker) help or what it takes for a driver to be supported?
If it's the former, you'd probably get better answers in another forum. Specifically the arcade controls forum.
If it's the later, the driver needs to feed the relevant data to the output system. It's up to external program to interpret this into something meaningful for your controls.
In terms of accuracy, at least in the MAME sense of the word, you won't find it with a general consumer-level wheel. From what I gather, there's a lot of different ways FFB effects are generated and they all give a different feel.
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