Hi, for the kde on cygwin project I have build a xfree 4.1 Xext lib with Xshm support, which needs the cygipc package. In the xfree 4.2.0 Xext source I haven't found any references like shmget/shmat and so one, only some shm requests to the xserver. Does this mean that this Xext lib does not need cygipc ? Thanks for answering Ralf