private void button1_Click(object sender, EventArgs e)
{
this.Hide();
DEV f6 = new DEV();
f6.Show();
}
private void btnRetour_Click(object sender, EventArgs e)
{
DEV f1 = new DEV();
Hide();
f1.Show();
}
private void btnNon_Click(object sender, EventArgs e)
{
this.Hide();
sessionLangage f3 = new sessionLangage();
f3.startingDay = startingDay;
f3.startingTime = startingTime;
f3.f4duration = duration;
f3.nomLangage = nomLangage;
f3.idLangage = idLangage;
DEV f2 = new DEV();
f2.isOpenedWindow = true;
f2.Show();
}