Smilebasic 4 Questions

So, I have recently bought Smilebasic 4 for the Switch and I don't know how some stuff works since I don't speak Japanese. So I have a question: How do you use the BUTTON instruction with the #B_ instructions?

You may want to read my page detailing many of the changes between SB3 and SB4. This link will take you directly to the section where I explain how input works in SB4. There's also an online version of the SB4 reference, which may be helpful since it's easier to machine translate.

Now I understand how it works. I'll probably refer to this guide in the future. Thanks!

Anybody Help with this?