A named item that retains a constant value throughout the execution of a program, as opposed to a variable, whose value can change during execution. Each host application can define its own set of constants. Additional constants may be defined by the user with the Const statement. Constants can be used anywhere in your code in place of actual values. A constant may be a string or numeric literal, another constant, or any combination that includes arithmetic or logical operators except the Is statement and exponentiation. For example:
Const strdb = "c:\Program Files\Microsoft Office\Access\Samples\Northwind.mdb"