Hi Reza

Hilmar's 4rth suggestion is what I use and it works very well. It also gives full control to end user.

-Also, perhaps you should reconsider adding an additional field. For instance, in one >case, I automatically put numbers, in increments of 10 (10, 20, 30, ...). The user >could re-order the rows, by changing the numbers (for instance, to put the third row >before the second, change the "30" to "15"). A "renumber" button on the form >would "clean up" the numbers, i.e., make the first record equal to 10, the second to >20, etc.