Get column index from datagridview cell on mousedown or mouse enter event

 Private clickedCell As DataGridViewCell

Private Sub dataGridView1_MouseDown(ByVal sender As Object, _

    ByVal e As MouseEventArgs) Handles dataGridView1.MouseDown

    ' If the user right-clicks a cell, store it for use by the 

    ' shortcut menu.

    If e.Button = MouseButtons.Right Then

        Dim hit As DataGridView.HitTestInfo = _

            dataGridView1.HitTest(e.X, e.Y)

        If hit.Type = DataGridViewHitTestType.Cell Then

            clickedCell = _

                dataGridView1.Rows(hit.RowIndex).Cells(hit.ColumnIndex)

        End If

    End If

End Sub