RETURNS A FILE EXTENSION FROM F
ACTION
The function FILE_EXTRACT_EXTENSION$(F) returns a file extension from the file expression F.
If there is no extension in the expression F, an empty string is returned.
SYNTAX:
Result$=FILE_EXTRACT_EXTENSION$(F)
USE ERROR EXAMPLE
rem create an open_dialog to point a file
open_dialog 1
rem display as window title the extension of chosen file
caption 0,file_extract_extension$(file_name$(1))
FILE_EXTRACT_EXTENSION$()
FILE_EXTRACT_EXTENSION$(F)
SEE ALSO
FILE_EXTRACT_DISK$(F)
FILE_EXTRACT_NAME$(F)
FILE_EXTRACT_PATH$(F)