>Say that I have a method on my form that I want to fire every time the user tabs out of one textbox and into the next. Or when they click on some other control on the form to change focus of that control....
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>So I'm looking for a way to fire this method as bascially any time focus changes on the form, but I do not want to add code to EVERY control's LostFocus() event.
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>Any ideas?
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>The reason for this is I need to run some calculations based on the inputs values of several textboxes, and I want it to fire every time they tab out of a textbox so I can update the data that I display on the form in other textboxes.

You would need to bind each control LostFocus to some form's method. You can do it in Form's Init.