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Constants

Constants are fixed named values available to the scripting compiler. They include date/time values, enumeration-style codes, file and stream modes, Variant type codes and Velox-specific identifiers.

Common tasks​

  • Use Date & Time constants with date calculations and formatting routines.
  • Use Enumeration and Velox constants when an API expects a named mode or product state.
  • Use File and Stream constants to select an explicitly documented access or positioning mode.
  • Use Variant and Variant Types to interpret or construct Variant values without using unexplained numeric literals.

Important behaviour​

The declaration or value on a child page is the registered scripting value. Its semantic meaning is established from the source registration and consumers; a familiar Delphi name alone is not sufficient evidence. Some constants are direct Delphi values, while others are Velox-specific aliases or snapshots created during compiler setup.

Constants cannot be assigned. A group can share a value model, but each physical page documents its own literal, aliases, valid consumers and any counter-intuitive numbering. Bit flags must be combined only when the underlying API accepts a set or mask.

Edge cases and quirks​

Numeric values can vary between unrelated enumerations even when labels look similar. Version- or platform-dependent upstream values are identified on the child page. Prefer the named constant to a hard-coded literal so the script states intent and remains aligned with the registered runtime.

  • Types > Enumerations and Types > Sets — domains represented by named values.
  • Functions and Classes — calls and properties that consume constants.