# Function Reference

# _NamedPipes_CallNamedPipe

Performs a read/write operation on a named pipe

#include <NamedPipes.au3>
_NamedPipes_CallNamedPipe ( $sPipeName, $pInpBuf, $iInpSize, $pOutBuf, $iOutSize, ByRef $iRead [, $iTimeOut = 0] )

## Parameters

$sPipeName | Pipe name
$pInpBuf | Pointer to the buffer containing the data written to the pipe
$iInpSize | Size of the write buffer, in bytes
$pOutBuf | Pointer to the buffer that receives the data read from the pipe
$iOutSize | Size of the read buffer, in bytes
$iRead | On return, contains the number of bytes read from the pipe
$iTimeOut | [optional] Number of milliseconds to wait for the named pipe to be available. In addition to numeric values, the following special values can be specified: -1 - Wait indefinitely 0 - Uses the default time-out specified in the call to the _NamedPipes_CreateNamedPipe() 1 - Do not wait. If the pipe is not available, return an error

## Return Value

Success: | True.
Failure: | False.

## Remarks

Calling _NamedPipes_CallNamedPipe() is equivalent to calling the _WinAPI_CreateFile() (or _NamedPipes_WaitNamedPipe(), if _WinAPI_CreateFile() cannot open the pipe immediately), TransactNamedPipe, and CloseHandle functions.
_WinAPI_CreateFile() is called with an access flag of GENERIC_READ | GENERIC_WRITE, and an inherit handle flag of False.
_NamedPipes_CallNamedPipe() fails if the pipe is a byte-type pipe.

## Related

_NamedPipes_TransactNamedPipe, _NamedPipes_WaitNamedPipe

## See Also

Search CallNamedPipe in MSDN Library.