How to put random numbers in text boxes in a Visual Basic form?

I’m making a math game on Visual studio, using a visual basic form. i’ve put in three text boxes. i have to put a random number in two of them (to make a mathematical equation), and the last one is for the user to input an answer. I need the user to input the answer, then a separate box to appear to tell them if they’re correct, or if they’re incorrect, then run the next form. I am a complete novice at code and any help at all is very much appreciated 🙂
Thanks.