We came across this problem ages ago & I am surprised its not been fixed yet. To be fair I think this is also a problem in standard MFC implementation as well (or was when we came across it).

It happens because the Dock Bar layout recalculation can be called when the window is minimized. As the window width is zero at that time, it causes the function to automatically wrap all the toolbars onto separate lines (which is by design if you set the width of a normal window so the toolbars do not fit). As it stands they do not snap back when the window is restored.

We worked around this by overriding the CXTDockBar::CalcFixedLayout and temporarily overriding the stored window size before calling the base class implementation, like this:

//////////////////////////////////////////////////////////// /////////////////

// CHyDockBar - to override toolbar layout function to stop wrapping

CRect rectLayoutTemp = m_rectLayout;

m_rectLayout.SetRect(0, 0, GetSystemMetrics(SM_CXSCREEN), GetSystemMetrics(SM_CYSCREEN));

CSize size = CXTDockBar::CalcFixedLayout(bStretch, bHorz);

m_rectLayout = rectLayoutTemp;

// NB Overrides standard MFC function to allow creation of derived CDockBar class

// in order to defeat 'toolbar wrapping' effect

ASSERT((dwDockStyle & ~(CBRS_ALIGN_ANY|CBRS_FLOAT_MULTI)) == 0);

m_pFloatingFrameClass = RUNTIME_CLASS(CMiniDockFrameWnd);