I simply installed VS2010 and added a new project to make a dialog-based mfc application. Double-clicking on the OK button of the dialog resource results in nothing. It should open the source file to something like OnButtonClick. Trying an alternate approach, explicity opening the Event Handler Wizard, the Message Type list is empty and the Add and Edit button is dimmed.
Visual Studio/Team Foundation Server/.NET Framework Tooling Version
Steps to reproduce
Operating System Language