eturns true if the text of the combobox is empty.

</dd>
<a id="isPopup,wComboBox"></a>
<dt><pre><span class="Keyword">proc</span> <a href="#isPopup%2CwComboBox"><span class="Identifier">isPopup</span></a><span class="Other">(</span><span class="Identifier">self</span><span class="Other">:</span> <a href="wTypes.html#wComboBox"><span class="Identifier">wComboBox</span></a><span class="Other">)</span><span class="Other">:</span> <span class="Identifier">bool</span> <span><span class="Other">{</span><span cla