Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
　　C1FlexGrid1.Cols(1).DataType = GetType(DateTime)
End Sub

Private Sub C1FlexGrid1_SetupEditor(sender As Object, e As C1.Win.C1FlexGrid.RowColEventArgs) Handles C1FlexGrid1.SetupEditor
　　If e.Col = 1 Then
　　　　Dim dt As DateTimePicker = CType(C1FlexGrid1.Editor, DateTimePicker)
　　　　dt.ShowCheckBox = False
　　End If
End Sub

private void Form1_Load(object sender, EventArgs e)
{
　　C1FlexGrid1.Cols[1].DataType = typeof(DateTime);
}

private void C1FlexGrid1_SetupEditor(object sender, C1.Win.C1FlexGrid.RowColEventArgs e)
{
　　if (e.Col == 1)
　　{
　　　　DateTimePicker dt = (DateTimePicker)C1FlexGrid1.Editor;
　　　　dt.ShowCheckBox = false;
　　}
}