Out of every FPS game out there, I'm sure every player out there wonders the same thing...
do they have drawing tablet support?

I've looked for many posts (I made it about two pages deep) and did not find an equilevant post describing this issue, but for context of the request;
I've been managing a drawing game in s&box, and one of the things I really want added is a proper drawing tablet pressure support. 
I managed to get Windows Ink pen pressure working in the editor by enabling a custom code path with: 
<DefineConstants>SANDBOX;WINDOWS_INK_DIRECT</DefineConstants>
and .sbproj via
"Compiler": {
      "RootNamespace": "Sandbox",
      "DefineConstants": "SANDBOX;WINDOWS_INK_DIRECT",
      "NoWarn": "1701;1702;1591;"
}

It works great while running in the editor, but a normal s&box client/package rejects the assembly because the native API calls aren't allowed by the s&box whitelist. So, I want native tablet pen pressure support for s&box.
I'm out of ideas and attempts, so making a post is pretty much all I can do for the moment

 Input.PenPressure Input.PenInRange Input.PenDown Input.PenEraser Input.PenTilt
^^ something describing those inputs would be more than enough or equivalent pointer/tablet input exposed through the normal s&box API would be incredibly useful.