I've tried everything. I actually managed to crash my computer when searching for a solution. Here's the thing:

 

In my frame, I have a docking pane and a splitter with two views. The sizes of the two views are very important, so I change them in CMyFrame::OnSize(). Now, if I attach my pane it simply pushes the whole splitter view to the side and NO size/move message is being sent!

 

I tried using Spy++ to track any messages to my pane and that caused my computer to crash. As far as I know, Spy++ only installs a hook. Why does it cause a severe crash?!

 

So my question is: How do I solve this absent resizing? Do I have to manually check the size of the frame window and subtract it by the pane window size and finally trigger a WM_SIZE somehow?

 

Thanks in advance!

 

When you attach docking pane/ when splitters of docking panes moved Frame never change its size, so Windows doesn't send WM_SIZE.

but size of _Splitter_ is changing.

So:

override CSplitterWnd (or CXTSplitterWnd if you use it) and catch WM_SIZE in this derived class.

 

Hope it will work :)