%KVERIFY
returns the position of the first character in source that is not
also present in excerpt. If all characters in source are present in
excerpt, %KVERIFY returns 0.
Autocall
macros are included in a SAS library. This library might not be installed
at your site or might be a site-specific version. If you cannot access
this macro or if you want to find out if the library is a site-specific
version, see your on-site SAS support personnel.