Go4Expert - PCIe SBCs communication

Hello all

I have some basic queries about Single Board Computers (SBC) especially relating with their communication in VC++ environment. Suppose i get two PCIe based SBCs and mount them in a chasiss with PCIe backplane available. I write a programm in C++ in Window based VS environment on both SBCs and i want to send some data from SBC-A to SBC-B. Is there any way to exchange data through PCIe bus using C++ Programming?

I have established communication among normal desktop PCs using Winsock routines in C++ but have no idea of sending/receiving data through PCI bus.

Kindly help me with any helping material or suggestions.
Thanks