Updated: July 20, 2015
For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.
Defines conditional compiler constants for Visual Basic.
#Const constname = expression
Required. Name of the constant being defined.
Required. Literal, other conditional compiler constant, or any combination that includes any or all arithmetic or logical operators except
Conditional compiler constants are always private to the file in which they appear. You cannot create public compiler constants using the
#Const directive; you can create them only in the user interface or with the
/define compiler option.
You can use only conditional compiler constants and literals in
expression. Using a standard constant defined with
Const causes an error. Conversely, you can use constants defined with the
#Const keyword only for conditional compilation. Constants can also be undefined, in which case they have a value of
This example uses the