>>>

>>>lUsesVCR()
>>> return Vartype(this.oPageFrame)='O'
>>>

>>
>>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.
>
>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.

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.