VFX: Where this or that defined

Code ran when Preview toolbar menu is clicked
vfxFormBase.vcx \cDataFormVfxBase \ onPrint

Code launched when toolbar menu is clicked:
Class vfxAppl \ cAppToolbarManager \ onItemClick

Code that launches database selection dialog
vfxAppl.vcx > cFoxApp.setClient:
...
Do Form vfxclien To ACTUALCLIENT
...

Where cConnectionMgr class is defined
vfxfunc.org

Where DataSource for CursorAdapter is defined
vfxCtrl.vcx > cBaseDataAccess.getDataSourcePlatformType

Where "ON ERROR" is defined
vfxappl.vcx > cfoxapp > start

Where 'oRecord' object is created
vfxFormBase > cDataFormVfxBase > Init:
thisform.addobject('oRecord', ALLTRIM(goprogram.ctablemanagerclass))

Where to set date format
Class appl > cFoxAppl > cDateFormat
It the above doesn't work, check vfxmsg.dbf and find Message_ID= [ID_DATESETTING] and alter memo field (Eng)