I would like to obtain digitizer coordinates using IRealTimeStylus and the final values should be "floating-point" screen coordinates. In other words since stylus is more accurate, I would like to get in-between pixels sub-coordinates too. From the device characteristics I can get conversion to Ink space and IInkRenderer can be used to convert ink space coordinates to Screen, but in this case they become integer and loses fractional parts. If I use digitizer coordinates and linearly map it to screen coordinates, this trick seems to be ok, but can I do this knowing for example that digitizers can be bigger than screen or have special relation to multi-monitor configuration. Is there an "official" way?