I do not have personal experience with TDPro, but Lookout does support several methods of communicating with other applications. If TDPro can behave as an OPC Server, then Lookout's "OPCClient" object could be used to read and write data from the server. Also, Lookout supports both DDE and ActiveX Automation, which are Windows standards for application-to-application communication.
Regards,
Greg Caesar
National Instruments, Applications Engineer
