What is a message map, and what is the advantage of a
message map over virtual functions?
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Answer / raju
Message Map is a logical table that maps the windows
messages to the member functions of the class.
Message map is to avoid following drawbacks:
1) Most windows only process a small number of messages,
yet each window require to giant virtual function table
with the entries of each message.
2) Virtual functions don't handle user defined messages and
other custom cases.
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