BigSpeed File Sharing Library includes two ActiveX controls (client and server) that dramatically simplify and accelerate the development of private file sharing solutions over the Internet. In gain to received FTP operations, such as upload, download, rename, delete, etc., the library also offers a issue of advanced features which afford the local application wide control over the remote files. The client is able to clear seekable streams on the server, either in read-only or read-write access mode. The application tush seek, say, an indite bytes to the stream as it is a local file. The client is able to ladder search operation on the server. The searching criteria may include file key masks (wildcards), text strings inner the files, or both of them. The found items are reported in real-time, while the operation is running. The server is able to perform remote file compression and decompression by a request from the client. During zipping or unzipping detailed procession information is provided back to the client around the current and come file and byte counts. Data security is provided by gossamer 128-bit AES encryption with shared crypto keys, without need of an SSL certificate. Building a virtual private file sharing network is scarcely a substance of setting the same crypto paint on client and server side. There is an option to compact on-the-fly the outgoing data before encrypting, which may contract greatly the transfer time for vauntingly files. BigSpeed File Sharing Library utilizes an elegant event-driven paradigm for light integration into Windows applications. A special attention is paid to render responsive user interface while maintaining maximum bandwidth efficiency. Carefully designed countersink of properties, methods, and events offers great flexibility to uprise innovative communication software. Sample applications are included in Visual Basic 6, Visual Basic .NET, Visual C++ .NET, and Delphi 7.