unsigned m_bRecomposeOnResize:1;
Remarks
Flag indicating the control wants to recompose its presentation when the container changes the control's display size. This flag is checked by IOleObjectImpl::SetExtent and, if TRUE, SetExtent notifies the container of view changes. if this flag is set, the OLEMISC_RECOMPOSEONRESIZE bit in the OLEMISC enumeration should also be set.
CComControl Overview | Class Members
See Also IOleObjectImpl::SetExtent