Custom coloring of CComboBox with drop list style doesn't work on Windows Server 2012 (and Windows 8

[EDN Admin]

Hi,
In our program we highlight combo box that have to be filled with yellow background.
This worked quite well with code similar to this until now:
BEGIN_MESSAGE_MAP(MyCb, CComboBox)
ON_WM_CTLCOLOR_REFLECT()
END_MESSAGE_MAP()
HBRUSH MyCb::CtlColor(CDC* pDC, UINT nCtlColor)
{
// yellow -> sets the color of the upper part
pDC->SetBkColor(RGB(255,255,0));
pDC->SetBkMode(TRANSPARENT);

// m_brush2 -> not used.
return m_brush2;
}
But on Windows Server 2012 the upper part is not coloured anymore (it works well if style is Dropdown, but not for Drop List).
Any ideas for workarounds?
Thanks, Thomas

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