Just engrave all the files with the suffixes vbp, frm, vbg and frx. If you just hand in the code, all the codes are in the file with suffix. vbp，。 FRM。 Buzz and. CLS。 You can open them with any text editor, copy them directly into a word file and hand them in. There are many reasons why vb files can't be opened. If the code is not corrupted, then the resource file such as. Frx is broken. Although it can't be opened, it doesn't affect your engraving.