Get InfoPath to Preview VSTO and VSTA Projects
A machine in a workgroup rather than joined to a domain will likely experience an issue that prevents you from being able to preview a managed code InfoPath project. Learn how to get past the not-so-helpful "InfoPath cannot open the selected form" error message.
Products:
InfoPath, Intenet Explorer, Office, Office InfoPath 2003 Toolkit for Visual Studio .NET, Visual Studio, Visual Studio Tools for Applications, Visual Studio Tools for Office and Windows