MLVersionNumbers()

#include <stdio.h>
#include "mathlink.h"

int main()
{
    MLENV env;
    int interface;
    int revision;
    int build;

    env = MLInitialize((char *)0);
    if(env == (MLENV)0)
        { /* unable to initialize the MathLink environment */ }

    MLVersionNumbers(env, &interface, &revision, &build);

    if(!(interface >= 3))
        {
        printf("Incorrect MathLink library available.\n");
        MLDeinitialize(env);
        return 1;
        }

    /* ... */

    MLDeinitialize(env);

    return 0;
}