HI,

 Put your style in the App.Xaml.

 Here a code snippet:

[Code]

<Application x:Class="WpfApplication4.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:igtl="http://schemas.infragistics.com/xaml"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <Style TargetType="{x:Type igtl:AxisEventsPanel}">
            <Setter Property="Background" Value="red"/>
        </Style>
    </Application.Resources>
</Application>

[\Code]

 Sincerely,
 Matt
 Developer Support Engineer