Thanks, Nikolay.

I've run the sample application, the appearance won't change unless I give a key "aa" to the Style and write "CustomFilterDialogStyle="{StaticResource aa}" as following:

<ig:FilteringSettings AllowFiltering="FilterMenu" CustomFilterDialogStyle="{StaticResource aa}"/>

Now I want to change the foreground and background color of the two textboxes on the right side of the dialog.  I believe the textbox above is the ContentControl with name "Operand1", and I set Background="red" Foreground="green" as following:

<ContentControl IsTabStop="False"
                                                    x:Name="Operand1"
                                                    Grid.Row="1"
                                                    Grid.Column="1"
                                                    Margin="5"
                                                    Width="100"
                                                    HorizontalContentAlignment="Stretch" Background="red" Foreground="green"/>

But it doesn't work. How can I change the textboxes' appearances?

I've already post a question (by the way of the support) about this problem, I've got the same explanation with also a sample, but nothing gones.

I try to edit the sample joined in this post, as following :

                                        <RadioButton x:Name="And"

                                                     GroupName="AndOr"

                                                     Content="AAAA"

                                                     IsChecked="true" />

Nothing changes when I execute the application.

Moreover, the 2 events Filtered and Filtering are not handled with CustomFilder Dialog