>I see that the ImageMap control, which can be used for navigating through a menu on a web form, has some sub-parts to it, i.e.:
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>(1) asp:RectangleHotSpot
>(2) asp:CircleHotSpot
>(3) asp:PolygonHotSpot
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>I wonder why these sub-parts of the asp:ImageMap control do not show up in some are of the Tools Menu; I know that it must be something that you just have to know by having read as much as possible on ASP.NET, but that is not intuitive by any degree. If I had not been reading through the book, titled "ASP.NET 3.5 UNleashed" by Stephen Walther, then I would never have known about these additional parts to the ImageMap control.
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>So, my question is, "Why would this be, in a way, concealed?" and "Is there any reason why these three parts could not be in a sub-menu of the ImageMap, somehow? Now, if you have your mouse cursor within the control's boundaries, and you hit the less than character key, you will see the three sub-parts of the ImageMap control and can then select one of them.

I think that hotspots aren't in the Toolbox because they are not 'top level' items - i.e. they only make sense when nested inside an ImageMap. The behaviour is standard - ListItems, for example, are not on the menu and are only selectable within a ListBox. FWIW the Hotspots collection can be set up in the ImageMap property sheet.