Solved: how range is defined for a worksheet?

[maryam]

I have this exel file with one worksheet. In the codes wriiten in the module there are:
.Temperature.SetValue Range("FeedTemp").Value, "C"
.Pressure.SetValue Range("FeedPres").Value, "bar"
.MolarFlow.SetValue Range("FeedFlow").Value, "kgmole/h"

I am confused how does FeedTemp replace for C15? where is it defined that FeedTemp is C15?