#define BUFSIZE 512
const WCHAR NAMED_PIPE[]=L"\\\\.\\pipe\\mynamedpipe";

int _tmain(int argc, TCHAR *argv[])
{
HANDLE hPipe;
LPTSTR lpvMessage=TEXT("Default message from client.");
TCHAR chBuf[BUFSIZE];
BOOL fSuccess = FALSE;
DWORD cbRead, cbToWrite, cbWritten, dwMode;

HANDLE hNamedPipe=CreateNamedPipe(NAMED_PIPE,
PIPE_ACCESS_DUPLEX,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
PIPE_UNLIMITED_INSTANCES,
BUFSIZE,
BUFSIZE,
0,
NULL);
if (hNamedPipe == INVALID_HANDLE_VALUE)
{
printf("failed to create named pipe. Error: %d \n", GetLastError());
return 0;
}

// Try to open a named pipe; wait for it, if necessary.
while (1)
{
hPipe = CreateFile(
NAMED_PIPE, // pipe name
GENERIC_READ | // read and write access
GENERIC_WRITE,
0, // no sharing
NULL, // default security attributes
OPEN_EXISTING, // opens existing pipe
0, // default attributes
NULL); // no template file

// Break if the pipe handle is valid.
if (hPipe != INVALID_HANDLE_VALUE)
break;

// Exit if an error other than ERROR_PIPE_BUSY occurs.

if (GetLastError() != ERROR_PIPE_BUSY)
{
_tprintf( TEXT("Could not open pipe. GLE=%d\n"), GetLastError() );
return -1;
}

// All pipe instances are busy, so wait for 20 seconds.

if ( ! WaitNamedPipe(NAMED_PIPE, 20000))
{
printf("Could not open pipe: 20 second wait timed out.");
return -1;
}
}

cbToWrite = (lstrlen(lpvMessage)+1)*sizeof(TCHAR);
fSuccess = WriteFile(
hPipe, // client pipe handle
lpvMessage, // message
cbToWrite, // message length
&cbWritten, // bytes written
NULL); // not overlapped

if ( ! fSuccess)
{
_tprintf( TEXT("WriteFile to pipe failed. GLE=%d\n"), GetLastError() );
return -1;
}

do
{
// Read from the pipe.

fSuccess = ReadFile(
hNamedPipe, // server pipe handle
chBuf, // buffer to receive reply
BUFSIZE*sizeof(TCHAR), // size of buffer
&cbRead, // number of bytes read
NULL); // not overlapped

if ( ! fSuccess && GetLastError() != ERROR_MORE_DATA )
break;

_tprintf( TEXT("\"%s\"\n"), chBuf );
} while ( ! fSuccess); // repeat loop if ERROR_MORE_DATA

if ( ! fSuccess)
{
_tprintf( TEXT("ReadFile from pipe failed. GLE=%d\n"), GetLastError() );
return -1;
}

printf("\n\n");

CloseHandle(hPipe);