I am using the K8061 USB interface board with the latest driver (k8061_vistapack_2007v1.zip). Looking into the K8061.DLL file and analyzing the source code for the old version of this dll I can see some undocumented functions:
procedure ReadCounters(CardNumber: Longint; Buffer: Pointer); stdcall;
procedure ResetCounters(CardNumber: Longint); stdcall;