摘要： [DllImport("user32.dll")] public static extern IntPtr SendMessage(IntPtr hWnd, uint msg, uint wParam, int lParam); private const uint WM_SYSCOMMAND = 0x0112; private const uint SC_MONITORPOWER = 0xF170; //关闭显示器 private void button1_Click(object sender, EventArgs e) { SendMessage(this.Handl 阅读全文