I'm surprised this is working at all. I would expect you to be getting a '"field" phrase is not found' error with that combination of RowSourceType and RowSource. When you use a RowSourceType of "Fields", it expects the RowSource to specify fields in the format alias.field,field,field. You're only using a single field, but there's no alias. And I don't think VFP likes having an expression there either.

If you switch your RowSourceType to 3 - SQL Statement and change the RowSource to [SELECT PR_NAME+LEFT(PR_ADDR1,18)+' '+PR_SYSNUM+' '+trans(PR_PHONE,"@R (999) 999-9999") FROM SomeAlias INTO CURSOR Junk] I'll bet it works.