ช่วยดูโค้ดให้หน่อยคับผมงงจิงๆ เกียวกับ DataGridView คับ

Private Sub dgvDetailProductReceive_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles dgvDetailProductReceive.KeyDown
        If (e.KeyCode = Keys.Enter) Then
            Dim numCols As Integer = dgvDetailProductReceive.ColumnCount
            Dim numRows As Integer = dgvDetailProductReceive.RowCount
            Dim currCell As DataGridViewCell = dgvDetailProductReceive.CurrentCell

            If currCell.ColumnIndex = numCols - 1 Then
                If currCell.RowIndex < numRows - 1 Then
                    dgvDetailProductReceive.CurrentCell = dgvDetailProductReceive.Item(0, currCell.RowIndex + 1)
                End If
            Else
                dgvDetailProductReceive.CurrentCell = dgvDetailProductReceive.Item(currCell.ColumnIndex + 1, currCell.RowIndex)
            End If
            e.Handled = True
        End If
    End Sub