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Holds the identifier of the message map currently being used for the contained window.
DWORD m_dwMsgMapID;
Remarks
This message map must be declared in the containing object.
The default message map, declared with BEGIN_MSG_MAP, is always identified by zero. An alternate message map, declared with ALT_MSG_MAP(msgMapID), is identified by msgMapID.
m_dwMsgMapID is first initialized by the constructor and can be changed by calling SwitchMessageMap. For an example, see the CContainedWindowT Overview.
Requirements
Header: atlwin.h