列のドラッグ移動時に表示されるインジケータのスタイルを変更するには、ドラッグインジケーター（GrapeCity.Windows.SpreadGrid.Presenters.DragIndicatorクラス）のスタイルをオーバーライドします。

◎サンプルコード(VB)

Imports GrapeCity.Windows.SpreadGrid.Presenters

Private Sub Window_Loaded(sender As Object, e As RoutedEventArgs)
　　gcSpreadGrid1.ColumnDragMode = GrapeCity.Windows.SpreadGrid.DragMode.Direct
　　EventManager.RegisterClassHandler(GetType(DragIndicator), Control.LoadedEvent, New RoutedEventHandler(AddressOf Me.DragIndicator_Loaded))
End Sub

Private Sub DragIndicator_Loaded(sender As Object, e As RoutedEventArgs)
　　Dim ctl As DragIndicator = CType(sender, DragIndicator)
　　Dim activeCellPosition As GrapeCity.Windows.SpreadGrid.CellPosition = gcSpreadGrid1.ActiveCellPosition
　　If activeCellPosition.IsEmpty Then
　　　　Return
　　End If

　　Dim customContent As Border = New Border
　　Dim textBlock As TextBlock = New TextBlock
　　textBlock.Text = activeCellPosition.ColumnName
　　textBlock.Background = Brushes.Yellow
　　textBlock.Padding = New Thickness(16, 4, 16, 4)
　　textBlock.FontWeight = FontWeights.Bold
　　customContent.Child = textBlock
　　ctl.Content = customContent
　　ctl.Style = CType(Application.Current.Resources("DragIndicatorBorderless"), Style)
End Sub

◎サンプルコード(C#)

using GrapeCity.Windows.SpreadGrid.Presenters;

private void Window_Loaded(object sender, RoutedEventArgs e)
{
　　gcSpreadGrid1.ColumnDragMode = GrapeCity.Windows.SpreadGrid.DragMode.Direct;
　　EventManager.RegisterClassHandler(typeof(DragIndicator), Control.LoadedEvent, new RoutedEventHandler(DragIndicator_Loaded));
}

private void DragIndicator_Loaded(object sender, RoutedEventArgs e)
{
　　var ctl = (DragIndicator)sender;
　　var activeCellPosition = gcSpreadGrid1.ActiveCellPosition;
　　if (activeCellPosition.IsEmpty)
　　{
　　　　return;
　　}

　　var customContent = new Border
　　{
　　　　Child = new TextBlock
　　　　{
　　　　　　Text = activeCellPosition.ColumnName,
　　　　　　Background = Brushes.Yellow,
　　　　　　Padding = new Thickness(16, 4, 16, 4),
　　　　　　FontWeight = FontWeights.Bold
　　　　},
　　　　BorderThickness = new Thickness(2),
　　　　BorderBrush = Brushes.Red
　　};
　　ctl.Content = customContent;
　　ctl.Style = (Style)Application.Current.Resources["DragIndicatorBorderless"];
}