Retrieve data from webservice

Hello NAV Experts,

I need to retrieve the data from webservice in NAV. I wonder what is the best way to accomplish this.

The Scenario as follows:

When the user click a button in NAV called Get Carrier Estimated Price, I need to show the retrieve prices for carrier and display it inside the NAV. I can call the webservice to get the price, can I call webservice inside NAV?