\func{}{wxURL}{\param{const wxString\&}{ url}}
-Constructs an URL object from the string.
+Constructs a URL object from the string. The URL must be valid according
+to RFC 1738. In particular, file URLs must be of the format
+'file://hostname/path/to/file'. It is valid to leave out the hostname
+but slashes must remain in place-- i.e. a file URL without a hostname must
+contain three consecutive slashes.
\wxheading{Parameters}