newbie: interprocess communication under windows

[yaniv]

hi 
i would like to create a simple interprocess communication
mechanism(under windows) that could pass a data structure between a
dos program( that runs on windows) and a python program .

the rate would be something around 20hz - data structure is small , a
few floats .

is memory mapping a good way to do this ? 
how do i do it ? 
psuedu code would be appreciated .


thanks ,
yaniv