DataGridViewの編集用テキストボックスを操作する方法

DataGridViewの編集用テキストボックスを操作する方法
VB.NET

Private Sub dgv1_EditingControlShowing(ByVal sender As Object, _
        ByVal e As DataGridViewEditingControlShowingEventArgs) _
        Handles dgv1.EditingControlShowing
    'DataGridViewTextBoxEditingControl
    If TypeOf e.Control Is DataGridViewTextBoxEditingControl Then
        Dim dgv As DataGridView = CType(sender, DataGridView)

        Dim tb As DataGridViewTextBoxEditingControl = _
            CType(e.Control, DataGridViewTextBoxEditingControl)

        If dgv.CurrentCell.OwningColumn.Name = "Column1" Then
            tb.ImeMode = Windows.Forms.ImeMode.Disable
        Else
            tb.ImeMode = dgv.ImeMode
        End If
    End If
End Sub

C#

private void dgv1_EditingControlShowing(object sender,
    DataGridViewEditingControlShowingEventArgs e)
{
    //DataGridViewTextBoxEditingControl
    if (e.Control is DataGridViewTextBoxEditingControl)
    {
        DataGridView dgv = (DataGridView)sender;

        DataGridViewTextBoxEditingControl tb =
            (DataGridViewTextBoxEditingControl)e.Control;

        if (dgv.CurrentCell.OwningColumn.Name == "Column1")
            tb.ImeMode = ImeMode.Disable;
        else
            tb.ImeMode = dgv.ImeMode;
    }
}