Collapsible Buttons Within Custom Toolwindow Header

Hi

I am using a custom header for each toolwindow I present to the user - this is created programatically.

What I have done is set a grid with a column for each button/content (Icon/Title/Close Button/etc) I want to see in the header - I then set this grid to be the content of the header.

All is fine.... however the issue I am now trying to solve is that when I reduce the width of the toolwindow,  the buttons (the grid/buttons are right justified) disappear as they cant fit the width of the window. I now have quite a few windows docked and I have them all set to inner-fill.

Can you recommend an object within actipro that I could use (perhaps a ribbon bar element if it was possible to reuse in the toolwindow header) that would be able to allow the buttons to be displayed perhaps in a list or dropdown, once the toolwindow became too small. Again I am not too sure if this is possible - I see something like this demonstrated in Visual Studio, where a 'down arrow' is presented once a window can no longer fit buttons across it and the buttons are displayed below the header bar.

PS I am also doing all of this programatically.

Thanks,

Bret