For as long as I can recall, Visual Studio has had an integrate dialog that allows you to easily organize the tab order of your controls.
I\'ve just created my first VS
It is still available, you just need to add it back to the View menu. Tools + Customize, Commands tab, Menu bar = View. Select the menu item in Controls where you want to insert it, say the bottom one. Then Add Command, Category = View, Commands = Tab Order.
Your memory of this command does sound a bit hazy, it was never on the Format menu and its never been a dialog. If you want to put it on the Format menu then you can, just pick the Format menu bar in the Commands tab. You can't make it a dialog though, it numbers the controls in the designer view. Some odds that you actually remembered the View + Document Outline command.