如何点右上角关闭[X]执行其他操作

protected override void OnClosing(CancelEventArgs e)
{
    if (this.Visible == true)
    {
        e.Cancel = true;
        //    this.WindowState = FormWindowState.Minimized;
        Hide();
    }
    // otherwise, let the framework close the app
}

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:窗口中如何实现对窗口右上解的关闭按钮编程

protected override void Dispose(bool disposing)
{
    if (disposing)
    {
        if (components != null)
        {
            components.Dispose();
        }
    }
    base.Dispose(disposing);
}

在里面加入你的代码

---

const int SC_MAXIMIZE = 0xF030;
protected override void WndProc(ref Message msg)
{
    if ((int)msg.WParam == SC_MAXIMIZE)
    {
        this.Height = 0;
        return;
    }
    base.WndProc(ref msg);
}