private void btnNextSoal_Click(object sender, EventArgs e)
{
Menu3_4 menu33 = new Menu3_4();
this.Hide();
DialogResult result = menu33.ShowDialog();
}
private void btnback_Click(object sender, EventArgs e)
{
this.Hide();
Menu3_4 menu34 = new Menu3_4();
DialogResult results = menu34.ShowDialog();
}