[Windows] Any way to distinguish ^C Induced EOF from ^Z EOF?

Dear All,

Just running the following test program:

         CtrlCRunner ctrl = new CtrlCRunner();
         ctrl.installCtrlC(
                 new Runnable() {
                     public void run() {
                         /* do nothing ! */
                     }
                 }
         );
         FileInputStream fs = new FileInputStream(FileDescriptor.in);
         byte[] buf = new byte[256];
         for (;;) {
             System.out.print("test: ");
             int len = fs.read(buf);
             String str = new String(buf,0,Math.max(0,len));
             System.out.println("len = "+len+", buf = "+str+",
buf[0]="+buf[0]);
             if ("exit".equals(str.trim())) break;
         }
         ctrl.deinstallCtrlC();

Noticed that ^C and ^Z both deliver EOF.

When pressing ^C

    test: len = -1, buf = , buf[0]=0

When pressing ^Z and ENTER:

    test: ^Z
    len = -1, buf = , buf[0]=0

How could I distinguish the two in Java?

Best Regards

BTW: It does not happen on Linux and Mac
OS with ^C and ^D, I only see this happen
currently on Windows 7.

Sounds similar to the following problem:
Inconsistent raw_input behavior after Ctrl-C
http://www.gossamer-threads.com/lists/python/python/781893