diff --git a/components/4nk/FolderChat.tsx b/components/4nk/FolderChat.tsx
index 99aed6e..6aec6aa 100644
--- a/components/4nk/FolderChat.tsx
+++ b/components/4nk/FolderChat.tsx
@@ -13,6 +13,8 @@ import {
   MessageSquare
 } from "lucide-react"
 import type { EnrichedFolderData } from "@/lib/contexts/FourNKContext";
+import MessageBus from "@/lib/4nk/MessageBus"
+import { iframeUrl } from "@/app/page"
 
 // Interface pour les props (accepte null)
 interface FolderChatProps {
@@ -45,10 +47,50 @@ export default function FolderChat({ folder }: FolderChatProps) {
   // Filtre les messages basé sur l'onglet actif
   const filteredMessages = mockMessages.filter(msg => msg.type === activeTab);
 
+  const handleProcessUpdate = async (processId: string, key: string, value: any) => {
+    try {
+      const messageBus = MessageBus.getInstance(iframeUrl);
+      await messageBus.isReady();
+
+      const updateData = {
+        [key]: value
+      };
+
+      // First update the process
+      const updatedProcess = await messageBus.updateProcess(processId, updateData, [], null);
+      if (!updatedProcess) {
+        throw new Error('No updated process found');
+      }
+
+      const newStateId = updatedProcess.diffs[0]?.state_id;
+
+      if (!newStateId) {
+        throw new Error('No new state id found');
+      }
+
+      // Then notify about the update
+      await messageBus.notifyProcessUpdate(processId, newStateId);
+
+      // Finally validate the state
+      await messageBus.validateState(processId, newStateId);
+
+      // Refresh the processes data
+      // const updatedProcesses = await messageBus.getProcesses();
+
+      console.log('Process updated successfully');
+    } catch (error) {
+      console.error('Error updating field:', error);
+      // You might want to show an error message to the user here
+    }
+  };
+
   const handleSendMessage = () => {
     if (newMessage.trim()) {
       console.log(`Envoi message [${activeTab}] à:`, folder?.folderNumber, "Msg:", newMessage)
       // TODO: Implémenter la logique d'envoi de message
+      if(!folder) return;
+      const key = activeTab === 'owner' ? 'messages_owner' : 'messages'
+      handleProcessUpdate(folder.processId, key, newMessage)
       setNewMessage("")
     }
   }
@@ -131,8 +173,8 @@ export default function FolderChat({ folder }: FolderChatProps) {
             <div>
               <div
                 className={`p-3 rounded-lg ${msg.sender === 'me'
-                    ? 'bg-blue-600 text-white rounded-br-none'
-                    : 'bg-gray-700 text-gray-100 rounded-bl-none'
+                  ? 'bg-blue-600 text-white rounded-br-none'
+                  : 'bg-gray-700 text-gray-100 rounded-bl-none'
                   }`}
               >
                 {msg.sender === 'other' && (