Hey, I was wondering if anybody can recommend a good/fast way for two VB .NET programs to "communicate" - to send data back and forth and read it or do whatever with it...

I have two programs, both in vb.net, and I need to program both to make them "understand" each other... For example, one.exe "asks" the other what is 2 + 2, and two.exe "returns" 4...

Can anybody recommend a good (and fast) way to do this?

Thanks,
Jon