Event when network changes

[Wandern]

Hello all,

I am trying to figure how to use an activex callback when the computers(windows 7) network connection changes.

I am able to access and use properties of the NETWORKLIST.INetworkListManager class but I am not able to get the Reg Event Callback to work for NETWORKLIST.INetworkListManager.NetworkConnectivityChanged.

Does anyone have experience with this class or more ActiveX knowledge to get this working?

Perhaps there is another more commonly used method to see network changes without polling?

I hope I have provided enough details to get some help. Thank you for your time.

[nyc_(is_out_of_here)]

---

@Wandern wrote:

Hello all,

I am trying to figure how to use an activex callback when the computers(windows 7) network connection changes.

I am able to access and use properties of the NETWORKLIST.INetworkListManager class but I am not able to get the Reg Event Callback to work for NETWORKLIST.INetworkListManager.NetworkConnectivityChanged.

Does anyone have experience with this class or more ActiveX knowledge to get this working?

Perhaps there is another more commonly used method to see network changes without polling?

I hope I have provided enough details to get some help. Thank you for your time.

---

I cannot get this working in LabVIEW 2013 32-bit.

Not sure why.

I am able to get the callback to work in C# Express 2010.

[Wandern]

Yeah, I am also able to get it to work using examples found for c# and c++, but no luck using labview (2012 here). It has stumped me.

[nyc_(is_out_of_here)]

One thing I noticed in your VI is that your Event Structure isn't in a WHILE loop.

You might create a Timeout case and "read" the network status as a workaround.

[Wandern]

Yeah, polling isn't a problem. There are a few solutions for that, but I was wanting to avoid doing it as it is more expensive than using a callback event.