>Got a date range, and if the Beginning Date is empty, but the user puts a something in the End Date, I need to display an error message and put the focus back in the Beginning date.
>
>So, someone please remind me how to do that?
>
>Thanks

SetFocus() method might work. But personally, I prefer a different approach: Postpone all validation. Only when the data is saved (or when the user presses an "OK" button to fire some other action, such as printing a report), should you run some code that does all the required checks. Just tell the user what is missing, and let the user complete the missing information, something like this:

do case
case empty(ldDate1)
  ErrorMessage('You need a "from" date.')
  return
case empty(ldDate2)
  ErrorMessage('You need a "to" date.')
  return
case ldDate1 > ldDate2
  ErrorMessage("The second date must be equal to, or after, the first date.")
  return
endcase

* Processing continues here

I am assuming a UDF called ErrorMessage().

The advantages of this approach are several. For one, the user can input data in any order. Two, programming the entire validation is fairly straightforward, and you can easily introduce conditions that span more than one field (such as the last CASE in my example).