Progress
External Program
Interfaces
Named Pipes
In the UNIX and Windows NT environments, you can establish interprocess communications (IPC) between a non-Progress application (such as a C program or commercial software package) and a Progress session using named pipes. This facility provides a capability similar to Dynamic Data Exchange (DDE) in Windows, though it works very differently.
From the Progress 4GL, named pipes look and act like operating system files. To exchange data, the Progress application reads or writes to a named pipe, just as it does to a file. However, instead of a file at the end of the pipe, the non-Progress application reads or writes data to the Progress application.
This chapter contains the following sections:
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