From the Active Desktop by Internet Explorer 4.x-based systems, choose View > Folder Options > File Types > Edit... > Actions: > New... > New Action: Action: Edit with Visual Studio Application used to perform action: "C:\\Program Files\\Microsoft Visual Studio Common\\IDE\\IDE98\\devenv.exe" "%1" Use DDE: (checked) DDE Message: Open("%1") Application: vstudio DDE Application Not Running: (empty) Topic: system