How to return cursor to focused string control?

[trout00]

I have attached a VI.
In this VI run, I type in a number to the first string control, the cursor will automatically jump to the next string control. However, if I type in a letter, there is a dialog pop up to inform about the correct response, then I want the cursor to return to the focused (first)string control. How do I make the cursor to return to the focused (first) string control?

[Feroz]

Hi,
I have made some changes to your VI to make it do what you are trying to do.

Sincerely,
FerozP

[trout00]

Hi FerozP,
It works really good and it is a lot simpler. thanks
I still don't understand why my keyFocus doesn't work.
If I would like my number of batteries from 1- 111. what do I need to change? (beside the upper limit)