your story is very incomplete, and shows no steps to reproduce.
a calculator is however very simple. even for beginners. i would suggest to make it yourself rather than using the snippet.
by the way, this is in no way valid code:
Textbox1.text = () + "1"
i would not use that snippet.
seach on the popular video site (hint hint) for 'calculator in vb' and just follow the first video.