BigSpeed File Sharing Library includes two ActiveX controls (client and server) that simplify and accelerate the development of private file sharing solutions over the Internet. In addition to standard FTP operations, such as upload, download, rename, delete, etc., the library also offers a number of advanced features which give the local application full control over the remote files.

The client is able to open seekable streams on the server, either in read-only or read-write access mode. The application can seek, read, and write bytes to the stream as it is a local file. It is able to run search operation on the server. The searching criteria may include file name masks (wildcards), text strings inside the files, or both of them.

The server is able to perform remote file compression and decompression by a request from the client. During zipping or unzipping progress information is provided back to the client about the current and total file and byte counts.