Hello, SaZ, you wrote: SaZ> Hello, nen777w, you wrote: N>> And QDockWidgets it is necessary to do, well here is how at Photoshop for example, at them UI on Qt and it is made? N>> new about windows in each other, works, but with bugs... Can too, that convenient. SaZ> my comment is a pity here. Very much does not suffice in the central region that as in a Visual Studio it was possible. Olivier Goffart Mod Troy Unrau o 9 months ago You do not need to call setCentralWidget on your main window. Dmitry Sazonov Olivier Goffart o 7 months ago Hello, I think that Troy is asking about additional flag in "Qt:: DockWidgetArea", something like "Qt:: CenterDockWidgetArea". It should work like dock widgets with code in MSVS. Possibly, the situation when as a central window - appears MDI-Child (or SDI-Child) is supposed. It not a dockable-window. All dockable-windows appear as some additional windows allocated along the edges from these (this only thing, in case of SDI) windows. About a Visual Studio - only the last some releases, support the text editor (an edit window of the codes) - as dockable. Even if to take 2008 - there a window of the editor of the codes - as child-window, instead of as dockable. How in modern MSVS, even on MFC Feature Pack not to make. It is very likely that in M $ for these purposes any "specialized" version MFC. P.S. Now variant MDI-tabbed GUI is popular, however, central windows and in this case - are not dockable.