#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);
}