How to make keyfocus on a text file?

I have a simple program to simulate keystrokes in LabVIEW. 

As shown in the image, if I press the bottom right button, it generates a string "Hello" in the string field.

However, I'm only able to make the key focus on the string field I created("Output" in the image).

I want to have my key focus on places such as a text file, google search engine, or generally any other place.

Not sure how to start this. I will appreciate any suggestions.

I have also attached the code underneath. Thanks in advance!

This LabVIEW code is based on https://forums.ni.com/t5/Example-Code/Programmatically-Simulate-Key-Strokes-in-LabVIEW/ta-p/3521756