h6. [[FilterManager]] h6(. » [[FilterManager SWI Calls|SWI Calls]] h6((. » Filter_RegisterPostRectFilter h2. Filter_RegisterPostRectFilter h5. (SWI &42648) |_<^. Entry | | |<^. R0 |<^. Pointer to zero terminated filter name| |<^. R1 |<^. Address of [[Post Rectangle Filter Code]]| |<^. R2 |<^. Value to be passed to R12 | |<^. R3 |<^. Task handle of task to which filter is applied, or 0 for all tasks | |_<^. Exit | |<. All registers preserved| h4. Use The purpose of this call is to add a new [[Wimp_GetRectangle]] filter to the list of post-filters. h4. Notes The address pointed to by R1 will be called whenever the task who's handle is passed in R3 calls [[Wimp_GetRectangle]]. h4. See also * [[Filter_DeRegisterPostRectFilter]]