(1)
It's not reasonable to use the component for time measurement without any methods.
The following code snippet measures the time of the for-cycle in counter ticks.

 MAIN.C

void main(void)
{
  unsigned char i;
  FC1_TTimerValue Time;
  
  FC1_Reset(); /* reset the counter */
  for(i = 0; i < 255; ++i); /* for-cycle */
  
  /* get measured time of whole for-cycle */
  if (FC1_GetCounterValue(&Time) == ERR_OK) {
    #if defined(FC1_UP_COUNTER)
      /* MilliSeconds = Time * 1000 / FC1_COUNTER_INPUT_CLOCK_HZ; */
    #elif defined(FC1_DOWN_COUNTER)
      /* MilliSeconds = ((FC1_TTimerValue)(-Time)) * 1000 / FC1_COUNTER_INPUT_CLOCK_HZ; */
    #else
      #error UP/DOWN COUNTER not defined
    #endif    
  } 
}

(2)
The following code snippet measures the time (in milliseconds) without reseting the timer.

 MAIN.C
 
void main(void)
{
  FC1_TTimerValue Time_Start, Time_End, Diff;
  
  FC1_GetCounterValue(&Time_Start);
  /* something to measure */
  FC1_GetCounterValue(&Time_End);
  
  #if defined(FC1_UP_COUNTER)
    Diff = (FC1_TTimerValue)(Time_End - Time_Start);
    #if defined(FC1_RESET_ON_COMPARE) /* Reset on compare selected? */
      if (Time_End < Time_Start) Diff += (FC1_TTimerValue)FC1_PERIOD_VALUE;
    #endif
  #elif defined(FC1_DOWN_COUNTER)
    Diff = (FC1_TTimerValue)(Time_Start - Time_End);
    #if defined(FC1_RESET_ON_COMPARE) /* Reset on compare selected? */
      if (Time_Start < Time_End) Diff += (FC1_TTimerValue)FC1_PERIOD_VALUE;
    #endif
  #else
    #error UP/DOWN COUNTER not defined
  #endif    
  /* MilliSeconds = Diff * 1000 / FC1_COUNTER_INPUT_CLOCK_HZ; */
}