Delete WHS Mobile Device Portal User Session in AX2012

dialog

protected Object dialog()
{
    Dialog              dialog;
    FormStringControl   control; 
    dialog = super();

    dialog.caption("WHS: Reset user session");

    fieldWHSUserId = dialog.addField(extendedTypeStr(WHSUserId), "Select User");
    control = fieldWHSUserId.control();
    control.registerOverrideMethod(methodStr(FormStringControl, lookup), 
                                   methodStr(WHSUserSession, lookup), this);

    return dialog;
}