a2ms@a2msg:~/linuxcnc/configs/a2gantry$ more gladetest.ui
<?xml version="1.0"?>
<interface>
  <requires lib="gtk+" version="2.16"/>
  <!-- interface-requires gladevcp 0.0 -->
  <!-- interface-naming-policy project-wide -->
  <object class="GtkWindow" id="window1">
    <child>
      <object class="EMC_MDIHistory" id="hal_mdihistory1">
        <property name="visible">True</property>
        <child>
          <placeholder/>
        </child>
      </object>
    </child>
  </object>
</interface>