Mario,
Prueba a incluir esta línea en el PRG:
#include "FWCE.ch"
function Main()
local oWnd, cValue, cText := "Hello world!"
DEFINE WINDOW oWnd TITLE "Folders"
TWBrowse()
@ 0.5, 1 FOLDER oFld PROMPTS "One", "Two" , "Three" ;
DIALOGS "sub1", "sub2" , "sub3" ;
SIZE 225, 245
...