Mouse Acceleration with bShowCursor=true

Hi,

so, my question would be how to get the actual Raw Mouse Acceleration?
I know i can get it using MouseX/Y Axis events, but that does not work correctly when using bShowMouseCursor=true in the PlayerController; I only get Axis Values != 0 when i press any mouse button additionally.

Also, when i try to get the raw mouse acceleration and the cursor is already at a screen edge, i no longer get any Axis values too.

What i would want is a raw mouse value that is independent of the cursor location and resembles the actual movement of the mouse.

Thanks,