Visual Foxpro 6.0

I have a text object that is on a form (N,9,0)

When the user inputs data, the LostFocus event checks to see if the input is acceptable. If it is, nothing happens. If it is not, it gives the user a message box telling them.

I want to force the cursor to the object that needs to be fixed.

How can I force the focus to a particular text object?