CComControlBase::m_bWndLess
Flag indicating the control is windowless.
unsigned m_bWndLess:1;
Remarks
注意
To use this data member within your control class, you must declare it as a data member in your control class. Your control class will not inherit this data member from the base class because it is declared within a union in the base class.
The data member m_spInPlaceSite points to an IOleInPlaceSite, IOleInPlaceSiteEx, or IOleInPlaceSiteWindowless interface, depending on the value of the m_bWndLess and CComControlBase::m_bInPlaceSiteEx flags. (The data member CComControlBase::m_bNegotiatedWnd must be TRUE for the CComControlBase::m_spInPlaceSite pointer to be valid.)
If m_bWndLess is TRUE, m_spInPlaceSite is an IOleInPlaceSiteWindowless interface pointer. See CComControlBase::m_spInPlaceSite for a table showing the complete relationship between these data members.
Requirements
Header: atlctl.h