The pp and pps commands in older TopSpin versions (2.0 and older) will produce an ASCII pile called peaks.txt. Newer TopSpin versions (2.1 and newer) produce an ASCII peaklist.xml file instead, which should be trivial to parse. There is also a convertpeaklist command which will produce a text (or xml) peak list from the peaaks list. You can also peak pick to a JCAMP-DX file with the ppj command.

I have a number of AU programs that parse the ascii peak list. As Kirk says, it is possible to use the "convertpeaklist" command. If you want to do that in an AU program, use the following routine:

//Create a peaklist and convert it to ASCII for reading
XWP_PP
XCMD("sendgui convertpeaklist txt")

If you want to parse it, there are 4 header lines which may or may not be useful to you and then you can run through the peaks:

for (i=1;i<=500;i++) /* give up after 500 peaks*/
{

  if(fscanf(fptr,"%*d %f %f %f %f",&PEAKA[i],&PEAKH[i],&PEAKP[i],&PEAKI[i])<3)
  {
    /* no more peaks to read */
    fprintf(flog,"%d peaks found\n",npeaks);
    break;
  }
  else
  { 
    //Do something useful
  }
}

I hope that is useful...