Thanks again George! After looking at your inifiles.prg, I modified my code based on your examples, and now it works! Below is my code:

LOCAL lnargs, lcresult, lcdefault, lnbufsize
lnargs=PARAMETERS()
lcresult=SPACE(200)
lnbufsize=LEN(lcResult)
lcdefault=' '
DECLARE SHORT GetPrivateProfileString IN WIN32API ;
STRING cIniSection, STRING cIniItem, STRING cDefault, ;
STRING @cReturnBuffer, INTEGER nBufferSize, STRING cIniFile
IF lnargs>=3
lnbufsize=GetPrivateProfileString(xInisection, xIniItem, lcdefault, @lcresult, lnbufsize, xIniFile)
ELSE
lnbufsize=0
ENDIF
IF lnbufsize>0
IF LEN(ALLTRIM(lcResult))=0
lcResult= ' '
ELSE
lcResult=LEFT(lcresult, lnbufsize)
ENDIF
ELSE
lcResult= ' '
ENDIF
RETURN lcResult