private void pcbxgeri_Click(object sender, EventArgs e)
        {
            Form3anamenü frm = new Form3anamenü();

            frm.Show();
            this.Hide();
        }
 private void timer1_Tick(object sender, EventArgs e)
 {
     progressBar1.Value += 20;
     if (progressBar1.Value == 100)
     {
         timer1.Stop();
         Form3anamenü frm = new Form3anamenü();
         frm.Show();
         this.Hide();
     }
 }