Hello,

You can find the styles for the controls under the Directory Program Files\Infragistics\NetAdvantage 2011.1\WPF\DefaultStyles. You can then modify the styles to round the corners by adding CornerRadius to the Borders:

<Style TargetType="igDT:XamDataTree">

            <Setter Property="Background" Value="White"/>

            <Setter Property="BorderBrush" Value="{StaticResource SilverlightDarkBrush}"/>

            <Setter Property="BorderThickness" Value="1"/>

            <Setter Property="Foreground" Value="Black"/>

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="igDT:XamDataTree">

                        <Border x:Name="Bd" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="15,15,15,15">

                            <Grid>

                                <Grid.RowDefinitions>

                                    <RowDefinition Height="*"/>

                                    <RowDefinition Height="Auto"/>

                                </Grid.RowDefinitions>

                                <Grid.ColumnDefinitions>

                                    <ColumnDefinition Width="*"/>

                                    <ColumnDefinition Width="Auto"/>

                                </Grid.ColumnDefinitions>

                                <igPrimDT:NodesPanel x:Name="NodesPanel" />

                                <ScrollBar x:Name="VerticalScrollBar" Width="20" Grid.Row="0" Grid.Column="1"/>

                                <ScrollBar x:Name="HorizontalScrollBar"  Height="20" Grid.Row="2"/>

                            </Grid>

                        </Border>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

<Style TargetType="{x:Type igDP:XamDataGrid}">

            <Setter Property="Background" Value="{DynamicResource {x:Static igDP:DataPresenterBrushKeys.BaseBackgroundKey}}"/>

            <Setter Property="Template">

                <Setter.Value>

                    <ControlTemplate TargetType="{x:Type igDP:XamDataGrid}">

                        <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="15,15,15,15">

                            <Grid x:Name="PART_ContentSiteGrid" />

                        </Border>

                    </ControlTemplate>

                </Setter.Value>

            </Setter>

        </Style>

Valerie