h6. [[FilterManager]] h6(. » [[FilterManager SWI Calls|SWI Calls]] h6((. » [[Filter_RegisterPostFilter]] h6(((. » Post Filter Code |_<^. Entry | | |<^. R0 |<^. Event reason code being returned for Post Filters| |<^. R1 |<^. Users event buffer| |<^. R2 |<^. Task handle of task that called [[Wimp_Poll]] | |<^. R3 |<^. Pointer to poll word if applicable| |<^. R12 |<^. Value of R2 when filter registered| |_<^. Exit | |<. It must preserve all registers (other than R0)| h4. Notes You may modify the reason code in R0 and the contents of the buffer pointed to by R1 to provide a new event. Return R0 = -1 to prevent event being passed to task. Please note: You must preserve all other registers (other than R0). h4. See also * [[Filter_DeRegisterPostFilter]] * [[Filter_RegisterPostFilter]]