package  ua.dn.mayton.tools.test_mailslots;

 import  jcifs.smb.SmbNamedPipe;
 import  java.io.InputStream;
 import  java.io.OutputStream;
 import  java.io.FileInputStream;
 import  java.io.FileOutputStream;

 public   class  testmailslot {

     public   static   void  main(String[] args)  throws  Exception
    {

         byte [] b =  new   byte [ 128 ];
         int  n =  4 ;

        //FileOutputStream fos = new FileOutputStream("SENDER\0SENDER\0My Message \0\0");

        String message="SENDER\0SENDER\0My Message \0\0";
        
        System.out.printf("Create smb named pipe....");
        System.out.flush();

        SmbNamedPipe pipe =  new  SmbNamedPipe(
                "smb://192.168.0.1/MAILSLOT/MESSNGR",
                SmbNamedPipe.PIPE_TYPE_WRONLY |
                SmbNamedPipe.PIPE_TYPE_CALL
        );
        System.out.printf("OK!\n");
        System.out.flush();

        System.out.printf("Get named pipe outputstream....");
        System.out.flush();

        OutputStream out = pipe.getNamedPipeOutputStream();

        System.out.printf("OK!\n");
        System.out.flush();

        System.out.printf("Write...");
        System.out.flush();

        //fos.write(b, 0, n );

        out.write(message.getBytes());

        //fos.close();
        out.close();

        System.out.printf("OK!\n");
        System.out.flush();

    }
}

Create smb named pipe....OK!
Get named pipe outputstream....Exception in thread "main" jcifs.smb.SmbAuthException: Logon failure: unknown user name or bad password.
	at jcifs.smb.SmbTransport.checkStatus(SmbTransport.java: 503 )
	at jcifs.smb.SmbTransport.send(SmbTransport.java: 614 )
	at jcifs.smb.SmbSession.sessionSetup(SmbSession.java: 277 )
	at jcifs.smb.SmbSession.send(SmbSession.java: 233 )
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java: 154 )
	at jcifs.smb.SmbFile.doConnect(SmbFile.java: 816 )
	at jcifs.smb.SmbFile.connect(SmbFile.java: 854 )
	at jcifs.smb.SmbFile.connect0(SmbFile.java: 793 )
	at jcifs.smb.SmbFile.open0(SmbFile.java: 870 )
	at jcifs.smb.SmbFile.open(SmbFile.java: 904 )
	at jcifs.smb.SmbFileOutputStream.<init>(SmbFileOutputStream.java: 142 )
	at jcifs.smb.TransactNamedPipeOutputStream.<init>(TransactNamedPipeOutputStream.java: 32 )
	at jcifs.smb.SmbNamedPipe.getNamedPipeOutputStream(SmbNamedPipe.java: 187 )
	at ua.dn.mayton.tools.test_mailslots.testmailslot.main(testmailslot.java: 38 )
	at sun.reflect.NativeMethodAccessorImpl.invoke0( Native  Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 39 )
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 25 )
	at java.lang.reflect.Method.invoke(Method.java: 597 )
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java: 90 )

Process finished with exit code  1