The research project KTI Da CaPo++ is based on the project Da CaPo (Dynamic Configuration of Protocols) at the ETH. The extended system of Da CaPo++ provides a basis for an application framework for banking environments and tele-seminars. It includes the support of prototypical multimedia applications to be used on top of high-speed networks including dynamically configurable security and multicast aspects.The main goal for this document is the description of the implemented design as stated elsewhere. It covers the application framework parts carried out at ETH and Da CaPo++ core system internal details concerning the security and relevant C-modules. These goals have been achieved and implemented under Solaris 2.5.1 on Sun workstations including multimedia equipment, such as cameras, microphones, and speakers.Finally, the implemented design of Da CaPo++ has remained independent of any specific transport infrastructure, as long as the considered network offers minimal features, e.g., bandwidth, delay, or bit error rates that are requested by an application. A heterogeneous infrastructure, including Ethernet and ATM (Asynchronous Transfer Mode), is supported, which has been demonstrated in the final project demonstration July 1, 1997