print widget implementation

Hi
I am working on an application (already created and implemented by some one else) which generates mail labels on the based of address search. I want to implement print widget in that using Export Web Map service.
But print functionality has already been implemented in that app using FlexPrintJob and FlexPrintJobScaleType.
I don't know how to change that. I want the widget to be displayed at the click event of a button.
Can someone please help me with this.

Thank you in advance.
Sonali