WINDOW-RESIZED causes screen flickering

I'm working in OpenEdge 10.2A environment.

The standar progress behaviour is that when you release the mouse button after you have resized the window, the event WINDOW-RESIZED is executed.

When i now add the commandbar to my program, then this event is executed numerous times while resizing the window.

The statement that causes this is:

chCtrlFrameCB:CommandBars:AddRibbonBar("RibbonBar")

How can i prevent this change of behaviour in this event so that it is again executed when expected in combination with the commandbar.

I attach the commandbar to the "real" window by code:

RUN GetParent( wwin:HWND, OUTPUT i_hWnd ).   

chCtrlFrameCB:CommandBars:AttachToWindow( i_hWnd ). 

I was able to attach the commandbar to a frame which would solve solve this unexpected behaviour, however i cannot apply this technique because then the standard windows window titlebar is not merged together with the ribbonbar.

I suspect that the resize of the commandbar is forcing the repaint of the window while resizing.

Is there a possibility to prevent this from happening ?