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What limited cirumstance? Are you suggesting using PRIVATE variables to get return values from some classes, and not others? Why the inconsitiancy when there are cleaner alternatives.
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The limited circumstance of returning a single value from a form class.

As for cleaner, I'll throw it back to you to differentiate between different levels of cleanliness...



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>There are only a couple of reasons I'd use a private variable. One, obviously, for anything I wanted to be global in the app (certian application objects, ect)
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Why not a public variable for these items?


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and another for exposing information to really abstract code, so a Parameters statement is not required. By "really abstract" I mean code usually written by a third party, and may or may not need the information I'm exposing. I don't think using private variables is a good idea here. Passing variables by reference is essentially the same thing, and much easier to understand in code.
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I don't understand where you are going here. You begin with espousing a second reasons where you would use a private variable. The passage above then concludes with why private variables are not a good idea in this case. Could you clarify what you mean here?

FWIW, I don't advocate the use of Private variables as a replacement for a parameters statement. I see these as different issues all-together...