CComControlBase::m_spDataAdviseHolder
Provides a standard means to hold advisory connections between data objects and advise sinks.
CComPtr<IDataAdviseHolder> m_spDataAdviseHolder;
Remarks
Observação
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.
A data object is a control that can transfer data and that implements IDataObject, whose methods specify the format and transfer medium of the data.
The interface m_spDataAdviseHolder implements the IDataObject::DAdvise and IDataObject::DUnadvise methods to establish and delete advisory connections to the container. The control's container must implement an advise sink by supporting the IAdviseSink interface.
Requirements
Header: atlctl.h