I am having issues with capturing function keys

I have a feature in a program that allows a user to make notes attached to a function key. They press the key and poof the predefined notes are added. The problem is that some of these keys have other features. I capture the key in the _Keypress  event. it works.  however if I for example press the F7 key, I get the notes fine but the cursor disappears entirely until you hit F7 again. This tells me that the keypress is being caught and processed but sent along to the OS also for processing. How do I stop that? how do I capture the key and process like I am but stop the key from any further processing by the OS?

Use 'Stop Event' to stop the keypress being picked up by the toolkit