Windows Explorer Right Click On Files With Multiple Extensions

Today I came across the following problem and tried to google for an answer, but without luck. In windows explorer, if I select files with different extensions (for example two files, one txt and one pdf) and right click to bring up the context menu, I noticed that the entry "Open" is missing. Instead if I select files with the same extension, the entry "open" is correctly displayed. What I want to do is to get the "open" command in the context menu even if I select files of different type. Is there a way to do that without having to write my own shell extension handler?