Subject how left() works in dbase 11 plus From AGOSTINHO <agostinhoteixeira@yahoo.com> Date Sun, 30 May 2021 21:52:41 -0400 Newsgroups dbase.getting-started Dear group, If I want to test an user's input in DBASE DOS I do somethng like this ?left(ccode,4) I've tried it in this function but I get an error also need to make sure that the input are numbers only. function ENTRYFIELD4_onKey(nChar, nPosition,bShift,bControl)       form.clients1.params['ag'] = '%'+this.value+'%'       form.clients1.requery()       if form.entryfield1.value.left(4)                    do something      endif      return