获得Memo、RichEdit的光标位置：

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procedure TForm1.Button1Click(Sender: TObject);
var Row, Col : integer;
begin
  Row := SendMessage(Memo1.Handle, EM_LINEFROMCHAR, Memo1.SelStart, 0);
  Col := CustEdit.SelStart - SendMessage(Memo1.Handle, EM_LINEINDEX, -1, 0);
  Edit1.Text:='行,列:'+IntToStr(Row)+','+IntToStr(Col);
end;

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