private void button1_Click(object sender, EventArgs e)
{
//lancer form intervenant
Form_Intervenant f3 = new Form_Intervenant();
f3.Show();
}
private void intervenantToolStripMenuItem2BBBBB_Click(object sender, EventArgs e)
{
Form_Intervenant f4 = new Form_Intervenant();
f4.TopLevel = false;
this.panel1.Controls.Add(f4);
f4.FormBorderStyle = FormBorderStyle.None;
f4.Top = 0;
f4.Left = 0;
f4.Size = f4.ClientSize;
f4.Dock = DockStyle.Fill;
f4.BringToFront();
f4.Show();
this.Text = "Intervenant";
}