Format  CpkErrCode CPK_GetErr (void)
 Input  None
 Output  None
 Function value  Error code
 Function  Returns the error code that occurred most recently. 

  Format  void CPK_SetErrFunc (CpkErrFunc func, void * obj)
 Input  func: Function to call when an error occurs
  obj: Registered object
 Output  None
 Function value  None
 Function  Set the function to be called when an error occurs. If the registration object is a registration function
  Passed to the first argument.