Thanks Hilmar,

This is what I understood from your resonse. Does this makes sense?

WITH THISFORM
.grdList.colcWorkOrderNo.AddObject("cbocWorkOrderNo", "combobox")
.grdList.colcWorkOrderNo.CurrentControl = "cbocWorkOrderNo"
.grdList.colcWorkOrderNo.cbocWorkOrderNo.RowSourceType=3
.grdList.colcWorkOrderNo.cbocWorkOrderNo.RowSource="SELECT SALEORDER_ITEMS.cWorkOrderNo,LINE.cCode FROM SALEORDER_ITEMS INNER JOIN LINE ON SALEORDER_ITEMS.cLineID=LINE.ID WHERE NOT INLIST(ALLTRIM(cStatus),'Cancelled','Closed') AND NOT EMPTY(cWorkOrderNo) ORDER BY 2,1 INTO CURSOR tmpProduction"
.grdList.colcWorkOrderNo.Sparse = .F.
ENDWITH