C# Hiding Window instead of closing

Question

I am attempting to intercept the close window but it seems to fail and close anyway for a form application. Essentially, this program should be waiting for input from a user on a signature pad and it pops up when someone starts signing but I need to prevent the program from being closed.

Here is what I tried that seems to have failed

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
    //reset hardware
    e.Cancel = true;
    sigPlusNET1.LCDRefresh(0, 0, 0, 240, 64);
    sigPlusNET1.LCDSetWindow(0, 0, 240, 64);
    sigPlusNET1.SetSigWindow(1, 0, 0, 240, 64);
    sigPlusNET1.KeyPadClearHotSpotList();
    sigPlusNET1.SetLCDCaptureMode(1);
    sigPlusNET1.SetTabletState(0);
    this.Hide();

}

Any Ideas?

Edit: With this code, the app closes normally and does not hide.

Here is the section that works just fine:

// Ok Button
private void cmdClose_Click(object sender, EventArgs e)
{
    //cmdSaveImage_Click(sender, e);
    this.Visible = false;
    sigPlusNET1.KeyPadClearHotSpotList();
    sigPlusNET1.ClearTablet();
    sigPlusNET1.KeyPadAddHotSpot(0, 1, 0, 0, 1000, 1000);
    progTimer.Enabled = true;
}

Answer 1

Make sure that Form1_FormClosing is specified in the form properties as the handler of the FormClosing event.

Alternatively, you can override the actual method itself.

    protected override void OnClosing(CancelEventArgs e)
    {
        e.Cancel = true;
        base.OnClosing(e);
    }