>>>No, it's not common. It's more common to use some kind of word that signals something about the return value, so your example would be UsesVCR() or HasVCR(). The word "Is" is often the first word in a method name for one that returns a logical.
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>>For methods returning some information about the parameter passed, I've found I began to like the IsA...() notation that the Feltmans use. IsA(toObj, tcClass) simply returns .f. if the second parameter is not among first parameter's class or one of parent's classes.
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>This all becomes a lot simpler in a strongly typed language. The compiler won't even let you try to pass a parameter of the wrong type.

How strong do you want it? And, are you sure this is good?

In this case, the parameter is an object - that's its type. Now if your smart compiler is too smart, it won't let you pass an object of wrong class (aside the question of how would it know) or of wrong base class. Then you'd have to apply some VB6 inheritance and overload the method for each class to which it may apply. Bad dreams of maintenance.