I was thinking it would be cool to write an API that would allow programmers to customize the thumbnail popups in windows 7, especially with the ability to add buttons (see http://dotnet.dzone....ndows-7-taskbar and attached image). From what I can tell, even after taking the knowledgebase steps on NIs site to make .NET 4.0 available in LabVIEW, the necessary namespaces are not available in LabVIEW. Even if they were, I'm not sure how I'd get this to work because it requires xaml files. I suppose I would have to write a .NET wrapper, but then I don't think this would be dynamic enough to make into a standard API for LabVIEW applications that need more or less buttons without modifying the wrapper text code. Unless, somehow you had all buttons fire a single event to be captured by LabVIEW in which the event data had the name of the button pressed, allowing you to determine what to do on that button press. Suggestions, or is this just not going to be possible?