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%ft (Filter for File Dialog) is used to change the default filter for subsequent use of the FILE_OPENR and FILE_OPENW call-back functions (see FILE_OPENR). The information is used in the standard Windows dialog displayed by these call-back functions. Two standard character strings are required after %ft. The first is the name of the filter (e.g. 'Executable files'). The second is the specification (e.g. '*.EXE').
If the grave accent modifier is used with %ft, the filter information replaces the existing information, otherwise it is added at the front of any existing filter information. The default filter selects all files.