Rem comment or ' comment
The comment argument is the text of any comment you want to include. After the Rem keyword, a space is required before comment.
As shown in the syntax section, you can use an apostrophe (') instead of the Rem keyword. If the Rem keyword follows other statements on a line, it must be separated from the statements by a colon. However, when you use an apostrophe, the colon is not required after other statements.
The following example illustrates the use of the Rem statement:
Dim MyStr1, MyStr2 MyStr1 = "Hello" : Rem Comment after a statement separated by a colon. MyStr2 = "Goodbye" ' This is also a comment; no colon is needed. Rem Comment on a line with no code; no colon is needed.