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► KB ► To/From Guides ► VB Classic ► Language Details

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Comments (Cross Ref > Language Details)

By Mike Prestwood

VB Classic versus C++/CLI: A side by side comparison between VB Classic and C++/CLI.

Language Basics

Language basics is kind of a catch all for absolute beginner stuff. The items (common names) I chose for language basics is a bit random and include items like case sensitivity, commenting, declaring variables, etc.

Comments

[Other Languages]

Languages Focus

Commenting code generally has three purposes: to document your code, for psuedo coding prior to coding, and to embed compiler directives. Most languages support both a single line comment and a multiple line comment. Some languages also use comments to give instructions to the compiler or interpreter.

VB Classic: ' or REM

Commenting Code
VB Classic, like all the VB-based languages, uses a single quote (') or the original class-style basic "REM" (most developers just use a quote). VB Classic does NOT have a multiple line comment.

Directives - #

Directives are sometimes called compiler or preprocessor directives. A # is used for directives within VB Classic code. VB Classic offers only an #If..then/#ElseIf/#Else directive.

Syntax Example:

'Single line comment.

REM Old school single line comment.
 
#If MyDirective Then
  '...some code.
#End If

VB Classic Comments (' or REM)

C++/CLI: // or /* ... */

Commenting Code
Same as standard C++. C++ uses "//" for a single line comment and /* */ for a multiple line comment.

Syntax Example:

//Single line comment in MS (not ANSI compliant so do NOT use).

/* ANSI compliant single line comment. */

/*
Multiple line
comment.

*/

/*

* This is another popular

* way to write multi-line

* comments.

*/