private void mFileCaptureMenu_Click(object pSender, EventArgs pArgs) { if (mCaptureDevice != null) { mCaptureDevice.Close(); mCaptureDevice = null; return; } SetupForm frmSetup = new SetupForm(); if (frmSetup.ShowDialog(this) != DialogResult.OK) return; foreach (PcapDevice device in new PcapDeviceList()) { if (device.Interface.FriendlyName == Config.Instance.Interface) { mCaptureDevice = device; break; } } mCaptureDevice.Open(true, 1); mCaptureDevice.SetFilter(string.Format("tcp portrange {0}-{1}", Config.Instance.LowPort, Config.Instance.HighPort)); }