>>>Is there any accepted standard for adding and retrieving a revision or version number to your own classes so that other people can anticipate the interface?
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>>I don't know about the standard, but Visual Extend has about() method for all classes.
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>Doesn't that just bring up a dialog? What I meant was to programmatically query the class as to what revision it was (i.e., getting some string value back).

No, that one doesn't do anything, it is just empty custom method, where you can put whatever you want.