Why (call-process ...) cannot be keyboard-quit on native NT

Hello All, perhaps someone could help me with this: (apply 'call-process "sleep" nil nil nil (list "30")) cannot be interrupted within 30 seconds. The C-g is only accepted when sleep returns after 30 seconds. The reason for this is that on Windows NT read_allowing_quit() used to read from the XEmacs stdin Lstream connected to the child-process calls int sys_read_1 (int fildes, void *buf, size_t nbyte, int allow_quit) { int rtnval; /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */ while ((rtnval = read (fildes, buf, nbyte)) == -1 && (errno == EINTR)) { if (allow_quit) REALLY_QUIT; } return rtnval; } Problem is that on NT the read() call in sys_read_1(...) is not interruptible by C-g. Therfor the "if (allow_quit) { ... }" test is only done after the child process completes. Any ideas what I could do to make (call-process ...) interruptible on Windows NT native? Is there a way to make read(...) interruptible on Windows NT? Best regards, Adrian