Hi everybody, I'm working on a user-control whose behaviour is identical to the TabControl. That is, there is an area in which the active sub-container (i.e. TabPage) can be selected plus an area in which users drop controls at design time. Browsing the web I found a couple of articles that are geared at enabling your control so that it works as a container at design time. I.e.: http://support.microsoft.com/?scid=kb%3Ben-us%3B813450&x=7&y=14 Und: http://blogs.msdn.com/subhagpo/archive/2005/03/21/399782.aspx With the help of these articles I was able to have the first TabPage act as expected. However, I cannot seem to find a way of tweaking the designer so that, when a different TabPage is being selected, that selected TabPage is selectable so that I one can drop controls into it. Any hinters greatly appreciated ... Cheers, Olaf