Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
If dataGrid2.SelectedCells.Count >= 0 Then
For Each row As DataGridViewRow In dataGrid2.SelectedRows
bookList.Items.Add(row.Cells(1).Value.ToString())
bookList.Items.Add(row.Cells(2).Value.ToString())
Next
Else
MsgBox("Select a Book!", MsgBoxStyle.Exclamation, "Warning")
End If