In ECO server versions 0.5.5 and up, .dll files are embedded into the server executable. Grab EcoServer_0.5.5+-Tentative Mod Kit.zip cooked up by Metachronism and I. It is an updated workspace in addition to an ingame command provided to extract the .dll files. Instructions are in the contained readme.
Posts made by Yesod
RE: Documentation on the CS api?