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+# $EPIC: which_function.txt,v 1.3 2007/03/02 02:32:04 jnelson Exp $
+======Synopsis:======
+$__which__(%%<file>%% [<dir>[:<dir> ...]])
+======Technical:======
+The %%<file>%% argument is a [[what is a word|dword]], which is different
+from most functions.
+This function returns the full pathname of the specified filename.  The
+function will search the client's current [[set load path|LOAD_PATH]] for the
+file.  In addition, a list of colon-delimited directories may be specified,
+which will be searched if the file is not found in the [[set load
+path|LOAD_PATH]].
+======Practical:======
+This function tries to find the location of a particular file.  This makes it
+suitable for [[LOAD]] and [[STUB]] commands, allowing a file to be loaded, even
+if its exact location is not known.
+======Returns:======
+the canonical path of the file, or nothing if it isn't found
+======Examples:======
+<file>
+$which(some_file)           shows full path of file
+$which(does_not_exist)      returns nothing, file dies not exist
+$which(some_file /bin)      search in /bin for some_file too
+</file>