Hi Ross,

To answer the first part of your question, you should be able to use the interface and properties described in this help page Interface IDmsView more specifically the Property Properties for the custom properties but at the present time that does not include the assigned Visio file name.

For the Visio file name you can use the following SLNet call should work for the Visio file

private static string GetVisioFileName(IEngine engine, IDmsView view)
{
var request = new GetInfoMessage(InfoType.ViewInfo);
var responses = engine.SendSLNetMessage(request).OfType<ViewInfoEventMessage>();

var viewInfo = responses?.FirstOrDefault(r => r.ID == view.Id);
return viewInfo?.VdxFileName;
}

This should work for your use case but I do have to add a disclaimer here that these kinds of SLNet calls are internal calls and typically not recommended to use since there is no official support and may be subject to change in the future.

Regarding the second part of your question, you must include the reference to the Class Library in your script.

The easiest way would be to develop your script inside Visual Studio and add the NuGet Package for Class Library.
See Skyline.DataMiner.Core.DataMinerSystem.Automation and Skyline.DataMiner.Core.DataMinerSystem.Common

Edited as per the comment of Jens