Whatever your preference is really, it's all in how you want to display it to the end user. The only difference between a Panel and a Groupbox is Groupboxes let you add a caption to it (panels don't), and Panels can have scrollbars (groupboxes can't). So if you need to add so many controls to a single window that it would make morse sense to have a scrollbar in it's frame, then a panel is useful. If you don't need a scrollbar, you can use either one. btw, in a Groupbox you can also have no caption if you want, just delete the default one it adds when you create it and don't type in anything.

That's called Input Validation. You can either trap the error(s) and handle them, or check them first, before anything else happens. I don't know if you're using text boxes, or what, for them to answer in, but for textboxes for example, you could check for it to be empty with something like an If txtBox.text.length = 0 then messagebox.show("You forgot to answer","Hey dum dum"). Or the same thing but check for an empty string like, If txtBox.text = "" then etc. etc.

There are similar ways to handle checkboxes. Option controls you don't need to worry about because as long as you set one of them as a default value when creating them, there'll always be one selected.

You can just zip up the entire project folder and send it to me. When you code in VS it automatically creates compiled versions in the "bin" folder, a subfolder in that project's folder. There'll be a Debug version and a release version. You can leave those out of the zipped up project though, to make the zip smaller. As soon as someone else runs it once in VS the get created. Btw, that's also where you get the final .exe to distribute once you're done ... the one in the Release folder.

Doing a Build also puts one in the Release folder.