SlickEdit command line file name completion supports wildcards. Normally, it will suggest completions based on a filename prefix match, but if you give it a wildcard, it will suggest completions matching that wildcard. This is convenient if you know you need to open a header file in a certain directory, but you do not remember it's exact name. Just go to the command line, type "e myIncludeDir/*.h" and then select from the list.