From: "H.Yamamoto" Date: 2004-09-10T09:13:27+09:00 Subject: Re: Win32API GetCurrentThreadID Hello. >irb(main):002:0> thread_id = Win32API.new('kernel32.dll', >'GetCurrentThreadID', [], "L") Last 'D' should be lower case. Try 'GetCurrentThreadId'. # Yes, this is quite confusing because 'GetSystemDefaultLangID' exists.