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Visual Basic Naming Rules

Office 2007

Use the following rules when you name procedures, constants, variables, and arguments in a Visual Basic module:

  • You must use a letter as the first character.
  • You can't use a space, period (.), exclamation mark (!), or the characters @, &, $, # in the name.
  • Name can't exceed 255 characters in length.
  • Generally, you shouldn't use any names that are the same as the functions, statements, and methods in Visual Basic. You end up shadowing the same keywords in the language. To use an intrinsic language function, statement, or method that conflicts with an assigned name, you must explicitly identify it. Precede the intrinsic function, statement, or method name with the name of the associated type library. For example, if you have a variable called
    , you can only invoke the Left function using
  • You can't repeat names within the same level of scope. For example, you can't declare two variables named
    within the same procedure. However, you can declare a private variable named
    and a procedure-level variable named
    within the same module.

    Ee440536.vs_note(en-us,office.12).gif  Note
    Visual Basic isn't case-sensitive, but it preserves the capitalization in the statement where the name is declared.