?Hi, here is a new patch. It propose to separate types of function by classes. For example : all virConnect[*] (virConnectOpen, virConnectNumOfDomains, etc...) functions are in the virConnect class. all virDomain[*] (virDomainCreate, virDomainDestroy, etc...) function are in the virDomain class. so we have these classes now : virConnect virDomain virEvent virInterface virLibrary virNetwork virNode virSecret virStoragePool virStorageVol virStream and finally libvirtError I know, the name is not correct, but I can't use virError name because virError is also a structure name :S don't know how to name it. This patch also introduce the DllMap configuration directive in Mono project, with this, the binary library names are correclty automagically changed at runtime (libvirt-0.dll under windows become libvirt.so.0 under linux...) so it guarantee the correct work under windows or linux. Sample code have been updated also to deal with new classes names Regards, Arnaud