QNX6.2 interface with OPC

I want to interface and establish communication between QNX6.2 application(WILL ACT AS OPC SERVER) and Windows application(WILL ACT AS OPC CLIENT).

The Windows application program is not within my scope.

What are the softwares required in QNX 6.2 application for interfacing with Windows based OPC client?
I cannot load any software in the Windows based OPC CLIENT as it is not in my control.