title: Selection changed event of ComboBoxEditSettings in a Devexpress gridcontrol(Silverlight)
body: <p>I am doin silverlight 4 App.</p>
  
  <p>I  have devexpress gridcontrol of 5 columns where i have placed ComboBoxEditor in a column .</p>
  
  <pre><code>&lt;dxg:GridControl x:Name="grid_currentillnes"&gt;
                              &lt;dxg:GridControl.Columns&gt;
                                  &lt;dxg:GridColumn FieldName="Complaints" Header="Complaints/Disease" /&gt;
                                  &lt;dxg:GridColumn FieldName="Duration" Header="Duratiion" /&gt;
                                  &lt;dxg:GridColumn FieldName="Period" Header="Period" /&gt;
                                  &lt;dxg:GridColumn Header="Treatment" FieldName="Treatment"&gt;
                                      &lt;dxg:GridColumn.EditSettings&gt;
                                          &lt;dxe:ComboBoxEditSettings x:Name="cmbx_treatmenttype" PopupMaxHeight="150"  DisplayMember="Treatment" ValueMember="Treatment"  /&gt;
                                      &lt;/dxg:GridColumn.EditSettings&gt;
                                  &lt;/dxg:GridColumn&gt;
                                  &lt;dxg:GridColumn Header="Details" FieldName="Details" /&gt;
                              &lt;/dxg:GridControl.Columns&gt;
                              &lt;dxg:GridControl.View&gt;
                                  &lt;dxg:TableView Name="tableView4" ShowGroupPanel="False"  NewItemRowPosition="Top" NavigationStyle="Cell"  /&gt;
                              &lt;/dxg:GridControl.View&gt;
                          &lt;/dxg:GridControl&gt;
  </code></pre>
  
  <p>I want get the <strong>selection changed event of the combobox editor</strong> but no such event exist..How is this done??</p>