>Hi Everyone,
>
>Can someone please tell me why in the code below the MessageBox gets caught in a continuous loop. This code is being called in the Valid event of a TextBox. Surely, I'm missing something.

If you're always returning 0 at the end, the control will never lose focus. You might want to restructure your logic as outlined below:

******************
local lnanswer, <b>lnRetVal</b>

If Empty(This.value)
  lnanswer=messagebox("First Name field cannot be blank",1,"Text Entry Error.")

  If lnanswer = 2 && If the Cancel button is clicked back out of the record.
    =Tablerevert()
    Thisform.flipenable
    Thisform.Refresh

    <b>lnRetVal = 1  && proceed to next control

  Else
    * User wants to try again:
    lnRetVal = 0</b>
   		
  Endif

<b>Else
  * Name not empty, this is OK, allow loss of focus:
  lnRetVal = 1</b>

Endif

Return <b>lnRetVal</b>
******************

It's one of my personal cardinal rules, to never use an IF statement without an ELSE - even if there's nothing to do, it encourages you to consider the flip side of the logic.