TeXnicCenter should be able to show window with structure of document:
I clicked through all menu but I am not able to find this option somewhere. I use last version (2.0 Beta 1) from their website.
You need a project in order to have a visible "structure." Moreover, this terminology has been updated and is now referred to as an "outline." And, with each project, there is an associated "main file." It's this file that TeXnicCenter starts with in order to build the outline view. To show the TeXnicCenter outline of a project, use Ctrl+Alt+O (or via the menus View > Tool Windows > Outline).
Note that the outline displayed requires a specific format for your files. That is, TeXnicCenter parses the main project file with every "Save" operation, including any subsidiary (included files). For example, if you have a project that has a main file
it will render in the project outline as
See how the project only displays the caption of the labelled float (