pb中DataWindowChild的基本用法

if dw_1.retrieve()>0 then
if not isnull(dw_1.getitemnumber(1,'MANUFACTURER')) then
datawindowchild d_child
dw_1.getchild('sbbm',d_child)
d_child.setFILTER("MANUFACTURER='"+string(dw_1.getitemnumber(1,'MANUFACTURER'))+"'")
d_child.FILTER()
end if
dw_list.settransobject(sqlca)
ls_new_sql=is_sql_ip+" and dslambm='"+ls_label+"'"
dw_list.setsqlselect(ls_new_sql)
dw_list.retrieve()
end if