#include "mathlink.h"
/* create a mark in a link, read some data, then back up */
void f(MLINK lp)
{
MLMARK mark;
mark = MLCreateMark(lp);
if(mark
(MLMARK)0)
{ /* mark creation failed */ }
/* read data from the link */
MLSeekToMark(lp, mark, 0);
MLDestroyMark(lp, mark);
}