Hi Alan,
I assume you were attempting to use the Switch Executive calls in the nise.dll (OpenSession, Connect, Disconnect, DisconnectAll, etc.). Unfortunately, as you stated above, the standard typelib won't allow you to make calls in the VB.NET environment.
However, a COM interface will work in VB.NET, so you will be able to use the Configuration API of Switch Executive. These function calls give you access to the definitions and configurations for all the switches, channels, hardwires, buses, exclusions, routes, and route groups associated with the switching configuration. In other words, if you are attempting to programmatically configure your Switch Executive Virtual Device, you can use the COM interface provided.
VB.NET is not yet a development environment supported by Switch Executive (we support C, CVI, LabVIEW, and VB6). In reference to the problem of using the Switch Executive function calls found in the nise.dll, one solution is to create a VB.NET wrapper. I have seen a VB.NET wrapper used before, and although it was neither fully developed nor tested, it did work with OpenSession, Connect, Disconnect, and CloseSession function calls. Until .NET is a development environment supported by Switch Executive, creating a VB.NET wrapper may be the way to go!
Let me know if you have further questions!
Chad Erickson
Switch Product Support Engineer
NI - USA
