//追加レンタル
private void button1_Click(object sender, EventArgs e)
{
RentalSettingForm Setting = new RentalSettingForm();
Setting.Show();
Hide();
}
private void NotifyIcon1_DoubleClick(object sender, EventArgs e)
{
RentalSettingForm Rental = new RentalSettingForm();
Rental.Show();
}
private void セットToolStripMenuItem_Click(object sender, EventArgs e)
{
RentalSettingForm Rental = new RentalSettingForm();
Rental.Show();
}