Ribbon - Maximized MDI child window doesn't occupy the entire main window if the Ribbon controls on these windows are merged

Question

When I create a new project I select the "DevExpress 2010 application" then I make the main form MDIForm and the second form MDIChild and then I added dxRibbon controls to both forms but when I create the second form and try to maximize it it produces this:

If there is no dxribbon control in the second form everything works OK, so I guess it has something to do with the Ribbon control itself any ideas?

The merging isn't the problem the main problem is that when you maximize the unit4 it doesn't fill the parent as in the picture.

Source Code: Here

Answer 1

Well it looks like it was a bug, still awaiting the details how to apply to older versions of DevExpress VCL the bug is confirmed and reproduced you can follow the details -->here--<

i will post the answer here also when i get it :) hope this helps some of you.

EDIT:

Response from DevExpress Developers:

There is no way to get the hotfix for VCL 12.1.6; this version is too old. Moreover, currently there are so many changes in the dxMessages.pas and dxBar.pas units (comparing to the released VCL 13.2.2 build) that it is even impossible to get the hotfix for VCL 13.2.2. Fortunately, we are finishing VCL 13.2.3 right now and this fix will be included there.

Bug fixed in:

v2013 vol 2.3 : Hotfix is not available, please wait for the next official update