You're probably fine compiling to 32 bit. If your client goes with 64 bit OS, your app will still work.

>I have adjusted all projects in that setup (GUI and two Windows Services) to compile under x86. So, I built a new setup. After a new install, it seemed to be work OK for one call for failed for all other calls after given the same message. This is to connect to a SQL Anywhere backend.
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>Most of the installations are under 32 bits. So, if I would to try to build a setup to compile under Any CPU and simply ask the client to install the 64 bits version for the ODBC for SQL Anywhere, where this is a 64 bits OS, would that be a better route to use instead of forcing my setup to stay on the 32 bits? Or, is this something I have to take care of under my setup?