Actually it's been possible to create value lists that draw their values from external files since way back in FMP 5.5 and earlier. :smileywink:
"I downloaded the trail version of FM 10 Pro and the external datasources are still grayed out for me. Are there special steps I need to do to activate this?"
What exactly is grayed out? The External Data Sources option under File | Manage? Or are you working with Manage | Value lists and attempting to specify the value list from an external file?
Either way, I don't see why this would be disabled in the trial version.
I was looking at the wrong option 'Use Value List from another file' and there the option of ODBC db's is disabled, which is logical :smileysad:.
I'm using SQL Server as a database and now I'm able to get values from my db as values for the Value List using the first option 'Use Value from field'.