public class MyHandler {        
    @Execute
    public void execute(final MApplication application_, Shell parentShell_, IEclipseContext context_) {    
        //open an XWTTitleAreaDialog
        XWTTitleAreaDialog myTitleDialog = new XWTTitleAreaDialog(parentShell_, CompositeElement.class, new Person());
        myTitleDialog .setMessage("This message is displayed in the description view", IMessageProvider.INFORMATION);
        myTitleDialog .open();                                      
    }
    
    @CanExecute
    public boolean canExecute() {
            return true;
    }
}

public class Person {
    private String name;
    /**
     * Constructor
     */
    public Person() {
        name = "Toto"; // just for example        
    }
    /**
     * @return the name
     */
    public String getName() {
        return name;
    }
    /**
     * @param _name the name to set
     */
    public void setName(String _name) {
        name = _name;
    }
}

<Composite xmlns="http://www.eclipse.org/xwt/presentation"
	xmlns:x="http://www.eclipse.org/xwt" xmlns:css="http://www.eclipse.org/css"
	xmlns:c="clr-namespace:myproject.ui" x:Class="myproject.ui.dialog.CompositeElement"
	bounds="0,0,636,516">
	<Composite.layout>
		<GridLayout numColumns="2" />
	</Composite.layout>
	<Composite.layoutData>
		<GridData grabExcessHorizontalSpace="true"
			horizontalAlignment="SWT.FILL" />
	</Composite.layoutData>

	<Label text="Name:"></Label>
	<Text text="{Binding path=name}">
		<Text.layoutData>
			<GridData grabExcessHorizontalSpace="true" widthHint="150"
				horizontalIndent="40" />
		</Text.layoutData>
	</Text>
</Composite>

public class CompositeElement extends Composite{
    /**
     * @param _parent
     * @param _style
     */
    public CompositeElement(Composite _parent, int _style) {
        super(_parent, _style);        
    }
}