May i ask some questions about POI

[C21]

HEi:
     thanks for your time to read this email. Rciently, I am using your POI to 
do read and modify the excel files.
     I 'd like to know : does POI have event? It means that when i change one 
cell, the related formula in other cells
   will change their value autommicly.
   
   Best regards!!