diff --git a/src/nzg_create.c b/src/nzg_create.c
index 3413207..de2a9c7 100644
--- a/src/nzg_create.c
+++ b/src/nzg_create.c
@@ -1,4 +1,10 @@
+#include    <unistd.h>  /* POSIX et al */
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <fcntl.h> /* pour O_RDWR */
+#include <sys/types.h>
+#include <sys/mman.h>
 #include "nzg_iface.h"
 #include "nzg_proto.h"
 
@@ -16,7 +22,20 @@ msgSpace * msgSpaceCreate(
 	msgPool * queueNbCar // tableau de caracteristiques des different pool
 	){
 
+  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);
+  if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
+	perror("shm_open");
+	return NULL;
+  }
+ 
+  
   // on ajoute spaceId a la liste des msgSpace connus
 
   // on crée queueNb files de messages
@@ -32,7 +51,17 @@ msgSpace * msgSpaceCreate(
 }
 
 
-void msgSpaceOpen(msgSpaceId){
+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);
+  if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
+	perror("shm_open");
+	return NULL;
+  }
   return NULL;
 }
 
diff --git a/src/nzg_global.h b/src/nzg_global.h
new file mode 100644
index 0000000..2a5f0e4
--- /dev/null
+++ b/src/nzg_global.h
@@ -0,0 +1,3 @@
+#include <unistd.h>
+
+#define PAGESIZE sysconf(_SC_PAGESIZE)
diff --git a/src/nzg_iface.h b/src/nzg_iface.h
index 0737813..c8fb611 100644
--- a/src/nzg_iface.h
+++ b/src/nzg_iface.h
@@ -1,4 +1,5 @@
-#include "types.h"
+#include "nzg_global.h"
+#define MSGSPACE_DEFAULT_MODE 0600
 
 typedef char * msgSpaceId;
 
diff --git a/src/nzg_main.c b/src/nzg_main.c
deleted file mode 100644
index 13a2c23..0000000
--- a/src/nzg_main.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "nzg_iface.h"
-#include "nzg_proto.h"
-
-int main(void) {
- // msgSpaceId mSID=msgSpaceIdGet(""); //renvoie un ID propre au programme
- //	msgSpace mS=0;
-  return 0;
-}
diff --git a/src/nzg_show.c b/src/nzg_show.c
deleted file mode 100644
index 991f6b0..0000000
--- a/src/nzg_show.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include "nzg_iface.h"
-#include "nzg_proto.h"
-
-int main(void) {
-  //show existing MsgSpaces 
-  char ** msID=msgSpaceIdList(); //renvoie un msgSpaceId 
-  msID=msID;
-  return 0;
-}
diff --git a/src/types.h b/src/types.h
deleted file mode 100644
index e69de29..0000000