See if this guide helps... http://mono.1490590.n4.nabble.com/Compiling-Mono-3-2-3-libraries-Windows-Visual-Studio-32-amp-64bit-td4661474.html -- View this message in context: http://mono.1490590.n4.nabble.com/Building-Mono-for-Windows-x64-tp4662436p4662461.html Sent from the Mono - Dev mailing list archive at Nabble.com.