Getting field name or caption where the selection is made in valueChange ev

I need to get the caption or field name, where the selection is made (comboBox field).
I need to get it in valueChange event.
Pls suggest a solution.

(I want dis bcoz i need to process 2 combobox with valueChange event, so need to identify from where the event is triggered)

Without knowing your implementation I would say event.getComponent() or event.getSource() should help.