private void button2_Click(object sender, EventArgs e)
{
if (v4 == null || v4.IsDisposed)
{
v4 = new Form6();
v4.Show();
}
}
private void button3_Click(object sender, EventArgs e)
{
Form6 form6 = new Form6();
form6.Show();
}
private void button1_Click(object sender, EventArgs e)
{
Form6 y = new Form6();
y.Show();
Hide();
}
