如何获取Memo的行数与列数《转》

var
Hang,Lie,Num,CharsLine:longint;
begin
Num:=SendMessage(Memo1.Handle,EM_LINEFROMCHAR,Memo1.SelStart,0);
CharsLine:=SendMessage(Memo1.Handle,EM_LINEINDEX,Num,0);
Hang:=Num+1;//当前行
Label3.Caption :='行数= '+IntToStr(Hang) ;
Lie:=(Memo1.SelStart-CharsLine)+1;//当前列
Label4.Caption :='列数= '+IntToStr(Lie) ;