Lhex recompiling

Dear List,
I need to build hex message to control my HE50SE caméra.
The message is like 8 digit in hex starting from
00000000 to 7FFF7FFF (4 digit for the pan movement and 4 digit for the tilt movement)
so i use Lhex from Peter Elsea Lobj collection.
This object is limited to 255.
In the C source code there is this sentence
#define MAXSIZE 256
So is it just this number to change and then recompile it to get higher values or is there much more under the hood i don't even know that it exist??
Thank you for any help or comment.
Cheers
Hubert

Lhex.cTXETEIWC
ˇˇˇˇW¿
Që^≤fˇ¿ÅÅRè// lhex file for Max object
// by Peter Elsea, University of California, Santa Cruz
// copyright © 1998, Regents of the University of California
// This code and the object created by it may be modified and/or
// distributed by any means, provided that this copyright and notice
// appear in all subsequent copies and documentation.

#include "ext.h"
#include
#include "ext_common.h"

#define MAXSIZE 256
#define ASSIST_INLET 1
#define ASSIST_OUTLET 2

typedef struct lhex
{
    struct object ob;

    Symbol *byteSym[256];
    Atom outList[MAXSIZE];
    int listsize;
    int oldListSize;
    long nextValue;
    int dataPending;
    int loHigh;
    int nibbleSize;
    int nibbleMask;
    int maxBytes;
    void *outL;
    Symbol *messageType;
} Lhex;

void *lhex_new();
void lhex_free();
void lhex_Lists();
void lhex_setConstant();
void lhex_floatConstant();
void lhex_anything();
void lhex_bang();
void lhex_du