>Right now, what I'm doing whenever I have a parameter whose value might change is to assign it to a property of the form and then keep changing the property as I need, but I thought it would be easier to simply build some smarts into the bizobj and have AddViewParameter deal with changes as well as additions.

In 3 yrs, I've only had one oddball situation where I didnt specify AddViewParameter in bizobj.postinithook() and that warranted me check manually checking scanning the array to see if my parameter waas already in there. Yet I've had dozens & dozens of situations where AddViewParameter() in PostInitHook() worked just fine.

So in light of that I'd say what your suggesting is unnecessary overhead... even if that functionality was in there it still makes much more sense to me to just flip flop the value of a custom property however many times I like as opposed to running method code for each and every potential change.