If I have a windows application. When clicking a button in this
application, I want to run another windows application. These 2
applications need to communicate with each other. How?

Thanks
Erez

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    Generally speaking, to run another application, you can use the static
Start method on the Process class.

    As for making them communicate with each other, it depends on which
route you want to go.  You might want to consider COM interop, or passing
messages between the two applications, or even pipes.  It all depends on
what your requirements are and if you have access to the code base for both
applications.

    Hope this helps.

--
                    - Nicholas Paldino [.NET/C# MVP]