Ctrl-Alt-E: Search Path and Expand

Searches the path for a command or file matching the word at the cursor. The full filename of the first matching file will be returned. (Only the first; there is no provision for handling multiple matches.)

There is one environment variable available to customize this action:

Variable NameDefaultDescription
PathExpandFlags6Bitmapped:
1search the current directory before %PATH
2search the registry App Paths before %PATH
4check the environment for executable extensions
64return only the filename, not its complete path
128automatically expand REG_EXPAND_SZ values

Ctrl-Alt-E is the default hotkey for this action, but you can change it with EDITKEYS /K23:key.