Welcome to HBH! If you have tried to register and didn't get a verification email, please using the following link to resend the verification email.
VB.NET Help...
Left() is a function for retrieving the leftmost characters from a string. It takes two arguments, the string and the length of the string that should be extracted from the first string.
Basically, he sets str to be the n characters from the original string. In this case the length of the string minus one. Thus removing the last character.