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    How i can communicate with server?

    Hello all. I begin to learn SmartGWT. I don't understand how can I communicate with server. In not GWT project i make a servlet, where i get parametrs what I need ( req.getParametr("ParamName") ) do what i want with them and after all setParam to req and call req.Dispatcher and all.
    How can I communicate with server in Smart GWT? I have a form with FormItem. I want to send textFromFormItem to server, do some operations with it and catch response ( change text).
    How can I do what? I read tutorial but don't understand.
    P.S. I'm bad at English, sorry:)

    Code:
     DynamicForm form = [B]new [/B]DynamicForm();
    form.setDataSource(dataSource);
    FormItem formItem = [B]new [/B]FormItem([B]"Word"[/B]);
    form.setFields(formItem);
    String textFromFormItem = formItem.getDisplayValue();

    #2
    Go to ​http://www.smartclient.com/smartgwt/showcase/#main and check form examples

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