h6. [[FilterManager]] h6(. » [[FilterManager SWI Calls|SWI Calls]] h6((. » Filter_RegisterCopyFilter h2. Filter_RegisterCopyFilter h5. (SWI &42646) |_<^. Entry | | |<^. R0 |<^. Pointer to zero terminated filter name| |<^. R1 |<^. Address of [[RectangleCopy Filter Code]]| |<^. R2 |<^. Value to be passed to R12 | |_<^. Exit | |<. All registers preserved| h4. Use The purpose of this call is to add a new [[Wimp_BlockCopy]] filter to the list of pre-filters. h4. Notes The address pointed to by R1 will be called whenever a task calls Wimp_BlockCopy with R12 equal to the value of R2 when this SWI is called. h4. See also * [[Filter_DeRegisterCopyFilter]]