cami58:
"Selected text" property is an "edit window" derived class window property, i.e.: the only window that has the "Selected text" property is one derived from EDIT CONTROL (like Rich Edit Control). In other words, there is no way of sending a EM_GETSELTEXT to a NON-EditControlDireved window.
As about InternetExplorer's view, it doesn't have a selected text (in the terms of an edit control). The text you can select in an IE View is a custom made feature of the view. (If you try to send a WM_GETTEXT to the IE View you will recieve nothing, because the text in IE View is not set by using WM_SETTEXT, or something like this, but is drawn by using, for example, DrawText).