From: Warren Young Date: November 16 2007 4:07am Subject: Re: 317 Linker Errors Visual Studio 2005 Windows XP 64-bit Round 2 more clues. List-Archive: http://lists.mysql.com/plusplus/7161 Message-Id: <473D179A.9040002@etr-usa.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit John Landrum wrote: > > http://pastebin.com/m69f8a320 You're trying to link a release version of the C API library (opt subdir) to a debug exe. Generally speaking, this does not work. Use libmysql.dll in the debug subdir instead. This is pointed out in README.vc