Windows API design

[Luckie]

Zitat von frankly:

Oh actually I just want one of the 6 programs to get input and output from the screen. So...this is what you mean? the communication?

That's exactly what I want to express by saying "communication".

Zitat:

Or you're saying I just have to do the pipes in order to do this?

That what I think.

Zitat:

And the GUI program (windows API) is simply creating the child windows and then execute the C programs. So it is not that easy?

I ain't sure how all your programs work, what they do, what kind of output tey have and what kind of input they need and how the should receive the input and what they do with the input. That's your job. All I can do is to tell you how applications can communicate. But I see your problem. Your programs weren't designed for this purpose. And that's the point, that makes it so difficult.