Until the progressbar value reaches 100 do not close the window

Question

Before you start, it’s not really a virus, it’s a game. I wish that while the progressibar does not reach 100% could not close the window by clicking the button and a popup appears saying that it can not close here is the code:

private void button1_Click(object sender, EventArgs e)
{
    if (progressBar1.Value != 100)
    {
        this.Hide();
    }
    else if (progressBar1.Value > 100)
    {
        MessageBox.Show("You need to wait the virus download");
    }
}

Answer 1

You can use the Onformclosing Event:

protected override void OnFormClosing(FormClosingEventArgs e) 
{
    base.OnFormClosing(e);
    if (progressBar.Value < 100) 
    {
        MessageBox.Show("Mensagem de alerta, não feche ainda!");
        e.Cancel = true;
    }
}

Source: https://stackoverflow.com/questions/1669318/override-standard-close-x-button-in-a-windows-form

Answer 2

Shura16’s answer is absolutely correct. The problem you encounter when compiling its answer is in the name of your progressibar. From what I’ve seen, your progressbar is named "progressBar1"

Try to copy the answer below:

protected override void OnFormClosing(FormClosingEventArgs e) 
{
    base.OnFormClosing(e);
    if (progressBar1.Value < 100) 
    {
        MessageBox.Show("Mensagem de alerta, não feche ainda!");
        e.Cancel = true;
    }
}