diff --git a/src/nzg_create.c b/src/nzg_create.c
index de2a9c7..67120dd 100644
--- a/src/nzg_create.c
+++ b/src/nzg_create.c
@@ -4,7 +4,7 @@
 #include <string.h>
 #include <fcntl.h> /* pour O_RDWR */
 #include <sys/types.h>
-#include <sys/mman.h>
+#include <sys/mman.h> /* shm_open */
 #include "nzg_iface.h"
 #include "nzg_proto.h"
 
@@ -21,15 +21,10 @@ msgSpace * msgSpaceCreate(
 	int poolNb, // nombre de pool de buffers
 	msgPool * queueNbCar // tableau de caracteristiques des different pool
 	){
-
+  int shmId;
   printf("PAGESIZE : %d\n",(int)PAGESIZE);
   // on créee
-  char * nzgId;
-  int slen;
-  int shmId;
-  slen=strlen(spaceId);
-  nzgId = (char *)malloc(sizeof(char)*(slen+4));
-  sprintf(nzgId,"/NZG%s",spaceId);
+  msgSpaceId nzgId=msgSp2nzgId(spaceId);
   if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
 	perror("shm_open");
 	return NULL;
@@ -52,12 +47,8 @@ msgSpace * msgSpaceCreate(
 
 
 msgSpace * msgSpaceOpen(msgSpaceId spaceId){
-  char * nzgId;
-  int slen;
   int shmId;
-  slen=strlen(spaceId);
-  nzgId = (char *)malloc(sizeof(char)*(slen+4));
-  sprintf(nzgId,"/NZG%s",spaceId);
+  char * nzgId=msgSp2nzgId(spaceId);
   if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
 	perror("shm_open");
 	return NULL;
@@ -66,7 +57,19 @@ msgSpace * msgSpaceOpen(msgSpaceId spaceId){
 }
 
 void msgSpaceDelete(msgSpaceId spaceId){
-  // 
-  
+  int shmId;
+  msgSpaceId nzgId=msgSp2nzgId(spaceId);
+  int er;
+  if ((er=shm_unlink(nzgId))<0){
+	perror("shm_unlink");
+  };
 }
 
+msgSpaceId msgSp2nzgId(msgSpaceId spaceId){
+  char * resNzgId;
+  int slen;
+  slen=strlen(spaceId);
+  resNzgId = (char *)malloc(sizeof(char)*(slen+4));
+  sprintf(resNzgId,"/NZG%s",(char *)spaceId);
+  return ((msgSpaceId)resNzgId);
+}
diff --git a/src/nzg_proto.h b/src/nzg_proto.h
index e7a032c..1acd116 100644
--- a/src/nzg_proto.h
+++ b/src/nzg_proto.h
@@ -8,11 +8,17 @@ msgSpace * msgSpaceCreate(
 	msgPool * queueNbCar // tableau de caracteristiques des different pool
 	);
 
-msgSpace * msgSpaceOpen(msgSpaceId spaceId);
-
 void * msgAllocate(
 	msgSpace * space, //espace de message concerné
 	int pool, //numéro de pool ou réaliser l'allocation
 	int taille, //si l'argument précédent est ANYPOOL, taille requise
 	int option // 0 ou NONBLOCK
 	);
+
+
+/* nzg_create.c */
+msgSpace *msgSpaceCreate(msgSpaceId spaceId, int queueNb, int poolNb, msgPool *queueNbCar);
+msgSpace *msgSpaceOpen(msgSpaceId spaceId);
+void msgSpaceDelete(msgSpaceId spaceId);
+msgSpaceId msgSp2nzgId(msgSpaceId spaceId);
+