Imports C1.WPF.FlexGrid

Class MainWindow
　　Private Sub Window_Loaded(sender As Object, e As RoutedEventArgs)
　　　　flexGrid.CellFactory = New CustomCellFactory()
　　End Sub
End Class

Class CustomCellFactory
　　Inherits CellFactory
　　Public Overrides Sub CreateCellContent(grid As C1FlexGrid, bdr As Border, rng As CellRange)
　　　　MyBase.CreateCellContent(grid, bdr, rng)
　　　　If (rng.Column = 0) Then
　　　　　　ToolTipService.SetToolTip(bdr, "ツールチップ")
　　　　End If
　　End Sub
End Class

using C1.WPF.FlexGrid;

public partial class MainWindow : Window
{
　　private void Window_Loaded(object sender, RoutedEventArgs e)
　　{
　　　　flexGrid.CellFactory = new CustomCellFactory();
　　}
}
public class CustomCellFactory : CellFactory
{
　　public override void CreateCellContent(C1FlexGrid grid, Border bdr, CellRange rng)
　　{
　　　　base.CreateCellContent(grid, bdr, rng);
　　　　if (rng.Column == 0)　
　　　　　　ToolTipService.SetToolTip(bdr, "ツールチップ");
　　}
}