PIPEACCESSDUPLEX

PIPEACCESSDUPLEX is a constant used in Windows programming, specifically within the Win32 API. It is an access mode flag associated with named pipes. When a named pipe is created with PIPEACCESSDUPLEX, it signifies that the pipe can be used for both reading and writing by the same process. This is in contrast to other access modes like PIPEACCESS_INBOUND (read-only) or PIPEACCESS_OUTBOUND (write-only). The DUPLEX flag allows for bidirectional communication over a single pipe handle. This is particularly useful for scenarios where a client and server process need to exchange data in both directions without establishing separate pipes for each direction. The constant's value is typically represented as a hexadecimal number, and it is used in functions like CreateNamedPipe to define the desired pipe access rights. Proper use of PIPEACCESSDUPLEX is essential for implementing effective inter-process communication using named pipes in Windows.