Appendix D. Constants and Enumerations

This appendix consists of a reference for Visual Basic's built-in constants and enumerations.

VB.NET defines several enumerations in the Microsoft.VisualBasic namespace. For instance, the CompareMethod enumeration is defined as:

 Enum CompareMethod     Binary = 0     Text = 1 End Enum 

Thus, we can use the following expressions in our VB code:

 CompareMethod.Binary CompareMethod.Text 

On the other hand, VB also defines two equivalent built-in constants in the Constants class of the Microsoft.VisualBasic namespace that serve the same purpose:

 VbBinaryCompare VbTextCompare 

Note, however, that VB does not define built-in constants corresponding to every member of every enum. For instance, there are no built-in constants that correspond to the OpenMode enum members . This enum is used in the FileOpen procedure/statement:

 Enum OpenMode     Input = 1     Output = 2     Random = 4     Append = 8     Binary = 32 End Enum 

In this appendix, we list all of the VB constants and enumerations.