Beware of Defxxx directives

Every now and then I see DefInt or DefLng directives spread over Visual Basic code modules, whose intended purpose is to revert the default data type from Variant to Integer or Long. I don’t encourage using this directive, because it makes all the procedures in the module dependent of something that is placed outside them. In other words, you don’t have self-sufficient and encapsulated procedures anymore.

You see the perverse effect of this when you move the procedure to another module or project that has a different Defxxx directive, or has no such directive at all. All of a sudden, your carefully tested procedures aren’t working as they used to do, but you’re the one to blame.

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