File transfer between PDA

Build a Class that will send/receive a file between two PDAs. 1) open dialog to user to select a (*.pdb) file from the root directory of the storage card. 2) send this file to the root directory of the storage card of another PDA. There should be a receiving program on this end. 3) transfer should happen with bluetooth, TCP/IP, or IrDA -- which ever is available. 4) this should work between 2 Palm OS PDAs, 2 PocketPCs or from any Palm to any PocketPC. 5) it is ok to have two seperate pieces of code for PPC and Palm Platform: --> Palm OS 4.x and above - in code warrior 9.2 --> PocketPC 2003 and above - in eVC++ 4.0 MFC