Visual Studio 2005 - Unable to load DLL 'xxx.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

For native dll and .lib files, check out whether those .dll and .lib files are in the PATH (environment variable). If not, you can either copy them to there; or, you can put them into a folder and add that folder into the PATH. Then restart VS and IIS (command "iisreset") to make sure the setting is picked up.