Clarification regarding UpdateInvoiceTotal hook

[Mohsin Sumar]

Hello

I see this hook UpdateInvoiceTotal let’s us do some extra processing when the total is amended.  

Does the hook execute BEFORE or AFTER the update? 

Is there a way to capture ANY update to an invoice, even if the text is changed while leaving the same amount? 

[Mohsin Sumar]

Hello, 

Any guidance?

Thanks,

Mohsin