The FCI (File Compression Interface) and FDI (File Decompression Interface) libraries provide the ability to create and extract files from cabinets (also known as “CAB files”). In addition, the libraries provide compression and decompression capability to reduce the size of file data stored in cabinets.-The FCI (File Compression Interface) and FDI (File Decompression Interface) libraries provide the ability to create and extract files from cabinets (also known as “CAB files”).　In addition, the libraries provide compression and decompression capability to reduce the size of file data stored in cabinets.