winform 关闭按钮 c# winform取消右上角关闭按钮的实现方法

public Form1()

{

InitializeComponent();

this.ControlBox = false;   // 设置不出现关闭按钮

}

//禁用窗体的关闭按钮

private const int CP_NOCLOSE_BUTTON = 0x200;

protected override CreateParams CreateParams

{

get

{

CreateParams myCp = base.CreateParams;

myCp.ClassStyle = myCp.ClassStyle | CP_NOCLOSE_BUTTON;

return myCp;

}

}

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)

{

e.Cancel = true;

}

// 重写OnClosing使点击关闭按键时窗体能够缩进托盘

protected override void OnClosing(CancelEventArgs e)

{

this.ShowInTaskbar = false;

this.WindowState = FormWindowState.Minimized;

e.Cancel = true;

}