private void btnOrderCallNum_Click(object sender, EventArgs e)
{
ReplaceBooks rb = new ReplaceBooks();
rb.Show();
this.Hide();
}
private void btnDone_Click(object sender, EventArgs e)
{
GetSelectedvaluesfromCombobox(cb1, cb2, cb3, cb4, cb5, cb6, cb7, cb8, cb9, cb10);
//for replace books
ReplaceBooks rb1 = new ReplaceBooks();
rb1.Show();
this.Hide();
}