Variables
VB does not require that variables be declared before they are used
unless Option Explicit is
On (its default value). In that case, you can
declare variables using the Dim,
Public, Private,
Protected, Friend, or
Protected Friend statements.
A variable name in VB must satisfy the following requirements:
It must be 16,383 or fewer characters in length.
It must begin with an alphabetic character or an underscore.
It cannot include embedded spaces.
It cannot contain any special (i.e., non-alphabetic, non-numeric) character other than an underscore.
It must be unique within its scope.
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