判斷文章中文字符數量

dim WINNT_CHINESE
   WINNT_CHINESE = (len("論壇")=2)

   function strLength(str)
       ON ERROR RESUME NEXT
       if WINNT_CHINESE then
          dim l,t,c
          dim i
          l=len(str)
          t=l
          for i=1 to l
             c=asc(mid(str,i,1))
             if c<0 then c=c+65536
             if c>255 then
                t=t+1
             end if
          next
          strLength=t
       else
          strLength=len(str)
       end if
       if err.number<>0 then err.clear
   end function