PowerShell attempt 1: python .\wheel-scroll.py
SetProcessDPIAware 1. SPI_GETWHEELSCROLLLINES original 3.
Eight SPI_SETWHEELSCROLLLINES steps 20,3,20,3,20,3,20,3 then restore 3. summary complete.
Desktop measurement: first red BASE 3 / NOW 20 at 34.375 s; four red intervals 34.375-36.125, 38.625-40.375, 41.625-43.625, 45.750-47.625.