private void button3_Click(object sender, EventArgs e)
 {
     Phan5.HinhHoc.Bai3 fr = new Phan5.HinhHoc.Bai3();
     fr.ShowDialog(this);
 }
Esempio n. 2
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 private void button4_Click(object sender, EventArgs e)
 {
     Phan5.HinhHoc.Bai3 fr = new Phan5.HinhHoc.Bai3();
     fr.Show();
 }