Hvordan kan man få to programmer til at benytte samme com port?

Er det noget du kan bruge? http://www.activxperts.com/activcomport/

/per

Hvad med at lave en service som håndterer com-porten for de to programmer?
Evt. kan du loope data ud af den ene com-port og videre ind i en anden (forudsat du har flere af dem).

Tjek denne her.

http://www.codeworks.it/net/VBNetRs232.htm

Overlapped I/O
Overlapped I/O is not as straightforward as nonoverlapped I/O, but allows more flexibility and efficiency. A port open for overlapped operations allows multiple threads to do I/O operations at the same time and perform other work while the operations are pending. Furthermore, the behavior of overlapped operations allows a single thread to issue many different requests and do work in the background while the operations are pending.

In both single-threaded and multithreaded applications, some synchronization must take place between issuing requests and processing the results. One thread will have to be blocked until the result of an operation is available. The advantage is that overlapped I/O allows a thread to do some work between the time of the request and its completion. If no work can be done, then the only case for overlapped I/O is that it allows for better user responsiveness.

Overlapped I/O is the type of operation that the MTTTY sample uses. It creates a thread that is responsible for reading the port's data and reading the port's status. It also performs periodic background work. The program creates another thread exclusively for writing data out the port.