Conditional Compilation (Visual Basic) 

In conditional compilation, particular blocks of code in a program are compiled selectively while others are ignored.

In This Section

• Conditional Compilation Overview
  Explains what conditional compilation is used for, and discusses the #Const and #If...Then...#Else directives.

• How to: Declare Conditional Compilation Constants
  Shows how to declare conditional compilation constants in the Property Pages dialog box, at the command line, or in your code.

• How to: Collapse and Hide Sections of Code
  Explains how to specify a block of code that you can expand or collapse using the Visual Studio outlining feature.

Related Sections

• Program Structure and Code Conventions
  Provides suggestions for making your code easy to read and maintain.

• Compiling to MSIL
  Explains how your source code is translated into Microsoft intermediate language (MSIL) by the compiler.

• Compiling MSIL to Native Code
  Provides an overview of the .NET Framework JIT (just-in-time) compiler that converts MSIL to native (CPU-specific) code.