VS 2010 Enter key in Textbox and Calling another Sub

I almost feel stupid for asking this because it should be something to google, but I wasn't successful. I got pretty comfortable with VBA and I was able to do it there, but I'm writing my first code outside of Excel.

I want to be able to hit the enter key in the textbox that will trigger another Sub to run. I have a feeling at times that I had the right code in place but there was something tripping me up along the way.