In windows XP, I want to be able to click on a .php file and have it opened in PHP Designer 2007, Or right-click on it and have an "edit" menu option presented to me. I know how to tweak the registry to do this in general, but what would the command line look like in this specific case ? PHP Designer does not do this automatically. It is as if the program does not allow commandline options. It only opens with the last file used or a menu of recently opened files.