Application requires change to use TLS instead of SSL

Hi,

Currently we have a client application (in individual workstations) built using Powerbuilder 10.01. It uses SSLv3 protocol to connect to the customer's webservice. But customer will no longer support SSL and asked us to change our application to support TLSv1, TLSv1.1 orTLSv1.2

Does anyone know of the changes required such that the PowerBuilder application is able to post messages to the Customer’s Web Services and receive the returned response for further processing?

Thanks in advance!