Virtual Rob has released the source code for the VIClient.DLL that was included with his Virtual MAC tool. The download links can all be found @ his new blog: http://virtual-rob.blogspot.com/. Using the regular SDK from VB (or any other .NET language) isn't that hard. The hard part is getting all the references in place and stub DLLs built.So Rob has updated his blog with instructions on how to do just that. And if you're still having problems, he included compiled versions of the stub DLLs. He has also cleaned up the code and released an updated version of his VIClient.DLL, as well as its full source code. Right now I guess thats about the closest thing there is to a VI VB Toolkit - though it would work equally well from any .NET language.