unsigned m_bNegotiatedWnd:1;
Remarks
Flag indicating whether or not the control has negotiated with the container about support for OCX96 control features (such as flicker-free and windowless controls), and whether the control is windowed or windowless. The m_bNegotiatedWnd flag must be TRUE for the m_spInPlaceSite pointer to be valid.
CComControl Overview | Class Members
See Also CComControl::m_bWndless, CComControl::m_spInPlaceSite