Hi, this seems to be the ASCII version of GetAdapterIndex, can't you call getInterfaceIndexByName and avoid the new #include?
I���m not sure what you mean by "ASCII version���. getInterfaceIndexByName also accepts a const char * rather than a WCHAR *. It seems to be the non-Microsoft version of getInterfaceIndexByName though.
getInterfaceIndexByName is just a wrapper around if_nametoindex. If I wrap IPHLP_if_nametoindex to getInterfaceByName I���d simply undo all the work getInterfaceByName does (or well, the part where it returns ERROR_INVALID_DATA instead of 0. I���m not sure if avoiding the #include is worth that. I���ll send a version that does that in a bit, you can then sign off on the one you prefer :-)