Почему нельзя прервать вызов ReadConsole?

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???????????, ??? ???-?? ? ???? ???? ????? ?????:

 BOOL Res =
    ReadConsole(
        GetStdHandle(STD_INPUT_HANDLE),
        Buffer,
        sizeof(Buffer),
        &ReadChars,
        NULL);

??????, ??????, ??? ? ?????-?? ?????? ????? ????????? ???????? ????? ReadConsole() (?? ??????? ??????). ??? ??? ????????

??? ??????????, ?? CancelIoEx(), ?? CancelSynchronousIo() ?? ???????? ? ???? ??????. CancelIoEx() ?????????? ?????? ERROR_INVALID_HANDLE, ? CancelSynchronousIo() - ERROR_OBJECT_NOT_FOUND. ????? ?????????, ?? GetStdHandle() ?????????? ???????? “3”, ??? ?? ?????-?? ?????? ?? ????????? (handle) ???????? ???????.

???????? ??????????? ? ???, ??? ?????????? ?????????? ????????????? ????????? ????????? Csrss (? Windows 7 - Conhost). ?????????? ??????? ????? ReadConsole() ?? ????? ???? ????????? RPC ?????? ? Csrss, ?????? ????????? ? ????. ??????????????, ???????? ??????? ???????? ????? ???? ?? ?????? CancelIoEx() ? ?????????? LPC ?????, ?????? ???????? «?????» RPC. ?????? ????????? ?? ????? ????????? ?? ????? ???????. ?? ? RPC ?????????? ????? ?????? ????? ????? ????? ???? ????????.

???????? ?????? ???????? ??????. ??-??????, ????? ???????? ????????? ?????, ???????? ???????. ??-??????, ????? ??????????? ?????????? ???? ? ??????? WriteConsoleInput(), ????????????? ??? ????? ReadConsole(). ? ????????? ??????? ????? ?????????? ?? ??????????? ????? ? ??????????? ReadConsole() ? ???? ?????????? ??? ReadConsoleInput(). ???? ???? ???? ?????? ??? ????????? ???????. ? ?????, ?? ?????? ??? ???…

Cross-posted from blog.not-a-kernel-guy.com.