When you right click a .Bas file, the highlighting is based on keywords in the \uCalcTransform\Data\PBKeywords.Txt file, which is parsed by \uCalcTransform\Transforms\PrettyBas.uc , which in turn is invoked by \uCalcTransform\FileTypes\Bas.  If you run the PrettyBas.uc transform found in \uCalcTransform\Examples\PowerBASIC, then the PBKeywords.Txt from that directory is used instead.

PBKeywords.Txt, renamed from WINKEYS.TXT, comes from the Public Domain PBWKeys4.zip file by PowerBASIC Inc. found at www.powerbasic.com/support/downloads/documentation.htm .  PowerBASIC is not affiliated with uCalc.