Developer’s Guide (Mac OS)

Binding solution files 4-5
Assigning the three-character extension on the Macintosh
On the Macintosh, these characters become the creator type for the
FileMaker Pro Runtime application. The creator type is stored in both
the solution files and runtime application, and makes identifying
solution files easier by associating files with the appropriate application.
Because creator types are four characters, FileMaker Pro Binder inserts
an upper case
F after the first character. For example, the default
three-character extension “USR” becomes the “UFSR” creator type.
Creator types are case-sensitive.
Important Creator types should be registered with Apple Computer to
verify that the creator type you choose is unique. If the creator type is
not unique, solution files may not open with the appropriate FileMaker
Pro Runtime application. Claris has registered the “UFSR” creator type
with Apple. Contact the Apple Developer Services or visit their site on
the World Wide Web to register any other creator types.
Assigning the three-character extension on Windows
The three-character extension registers your runtime application with
the operating system. The extension is used by Windows to define the
icons used for the documents, and to determine which application starts
when you open the primary file. The extension is generated by inserting
a period at the start of the string. For example, the three-character
extension “USR” becomes the “.USR” extension. The runtime
application adds the extension to the filenames during the binding
process. You must choose an extension that is unique to your end-user’s
system.
Files are grouped by type
Windows solution