Visual Basic 6 Examples
In the Visual Basic 6 language, subprograms are termed functions or subs (or methods when associated with a class). Visual Basic 6 uses various terms called types to define what is being passed as a parameter. By default, an unspecified variable is registered as a variant type and can be passed as ByRef (default) or ByVal. Also, when a function or sub is declared, it is given a public, private, or friend designation, which determines whether it can be accessed outside the module and/or project that it was declared in.
Read more about this topic: Subroutine
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