code for sending file using serial connection

I need a code for sending text file between two computers connected to serial cable (null modem) using comm port. Code needs to automatically send file every 5 min.. to slave computer ( just like how most Synchronizedsoftware) I use the “synchronEX?? software before for same function when the computer was connected to Ethernet network.. but now I need same type of function for serial network system… The file is only very small TXT format that is updated every 5 min from a mater system.. I need system to send that file to slave system using the serial connection automatically. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform master: window XP slave: window XP embedded