public static extern int SiButtonPressed(ref SiSpwEvent_HWButtonData pEvent);
public static extern SpwRetVal SiGetEvent(IntPtr hdl, int flags, ref SiGetEventData pData, ref SiSpwEvent_HWButtonData pEvent);
public static extern int SiButtonPressed(ref SiSpwEvent_HWButtonData pEvent);
public static extern SpwRetVal SiGetEvent(IntPtr hdl, int flags, ref SiGetEventData pData, ref SiSpwEvent_HWButtonData pEvent);