API /OCX for XBee´s?

I am trying to develop a home automation I/O with XBee modules. Mainly read and set digital I/O remote.
running ZNET 2.5 API firmware 1341 and a coordinator API.
is there any API´s OCX or any other libraries for VB6 or .net? any example code apreciated…
kind regs

Wallebalboa, This link is somewhat related to VB question. Please take a look.