Thanks for the replies. I developed something that works. its not very tidy but it does the job... may be i will refactor later...
sorry for the english but im from Argentina!
<canvas debug="true">
<class name="chatSender">
<attribute name="_netConnection" />
<attribute name="_sharedObject" />
<handler name="oninit">
this._netConnection = new NetConnection();
this._netConnection.connect("rtmp://localhost/oflaDemo/room1");
this._sharedObject = SharedObject.getRemote("chat", this._netConnection.uri, true);
this._sharedObject.connect(this._netConnection);
Debug.write("ChatSender iniciado");
</handler>
<method name="sendMessage" args="mensaje">
Debug.write("SendMessage: " + mensaje )
this._sharedObject.send("messageHandler",mensaje);
</method>
</class>
<class name="chatReceiver">
<attribute name="_netConnection" />
<attribute name="_sharedObject" />
<handler name="oninit"><![CDATA[
this._netConnection = new NetConnection();
this._netConnection.connect("rtmp://localhost/oflaDemo/room1");
Debug.write ("netConnection:" + this._netConnection);
this._sharedObject = SharedObject.getRemote("chat", this._netConnection.uri, true);
this._sharedObject.connect(this._netConnection);
Debug.write ("sharedObject:" + this._sharedObject);
this._sharedObject.messageHandler = function(str) {
var textoAnterior = texto.text;
Debug.write( textoAnterior + "<br/>" + str);
texto.setAttribute("text", textoAnterior + "<br/>" + str);
};
Debug.write ("chatReceiver iniciado");
]]>
</handler>
</class>
<chatReceiver name="chatRec"/>
<chatSender name="chatSen"/>
<simplelayout/>
<view width="400" height="600" bgcolor="red">
<text id="texto" width="400" height="600" multiline="true"/>
</view>
<view bgcolor="red">
<simplelayout axis="x"/>
<inputtext bgcolor="white" width="350" id="mensajeAEnviar"/>
<button width="50" onclick="canvas.chatRec._cajaChat=texto; canvas.enviarTexto(mensajeAEnviar.text);">Enviar</button>
</view>
<method name="enviarTexto" args="texto">
Debug.write("enviarTexto:" + mensajeAEnviar.text);
canvas.chatSen.sendMessage(mensajeAEnviar.text);
mensajeAEnviar.setAttribute("text","");
</method>
</canvas>