Enums

Enums define a named set of integer constants. They are useful when a value should come from a fixed list, such as directions, states, or modes.

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Declaration Syntax

Enum Direction
    North
    South
    East
    West
End Enum

• Enums are top-level declarations.
• Each member must be on its own line.
• The block must end with End Enum.

Member Values

Members can use automatic values, explicit values, or both.

Enum Status
    Idle
    Running = 10
    Paused
    Stopped = 100
End Enum

• The first implicit member starts at 0.
• Each following implicit member uses the previous value plus one.
• An explicit member resets the running value, and the next implicit member continues from it.
• Explicit values must be integer literals.
• Duplicate member names in the same enum are not allowed.

Using Enum Members

Use enum members with EnumName.MemberName.

Enum Direction
    North = 0
    South = 1
End Enum

Dim dir As Direction
dir = Direction.North

If dir = Direction.South Then
    Cls
End If

• Use a member access expression like Direction.North.
• The bare enum name (for example Direction) is a type name, not a value expression.

Common Errors

• Missing End Enum
• Duplicate enum names in the same program
• Duplicate member names in one enum
• Explicit member value is not an integer literal
• Unknown enum member name in EnumName.MemberName