Serialization is not just storing or retrieving information to and from disk filesystem. It is generic to any file stream class. CArchive class is used to make it generic to any stream.
Serialization routine does not directly deal with CFile. It uses CArchive object instead of CFile. CArchive class decouples the file object from Serialize() routine.
Serialize routine has this prototype.
void Serialize(CArchive& ar)
Let us look into a simple example. Here we declared a class called CStudent to store and retrieve fields of a student. It contains standard, enrollment number, name, marks and age. We are saving or restoring these members Serialize routine.
CArchive and Serialization
Serialization routine uses CArchive object and CArchive is constructed from a generic file stream. This is to support any type of stream classes in Serialize routine and make it independent of file stream. Thus Serialize is not limited to disk/storage files. It can be socket file to Serialize in network stream or serial stream file transmitted in serial port.
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MFC hides WinMain in its framework and includes source file on WinMain(). This explains how framework calls global CWinApp::Initinstance() from entry WinMain.
This is constructed during global C++ objects are constructed and is already available when Windows calls the WinMain function, which is supplied by the ...
Define a custom Window class structure, Register the class name, CreateWindow, Show windows and write message get and dispatch loop statements. Define the Window CallBack procedure and write the handlers.
DispatchMessage() is a API which indirectly triggers the Window CallBack procedure. Message structure members from this function are passed to the CallBack procedure. CallBack procedure should implement event handlers depending on the need of the application.
LPARAM and WPARAM are the two parameters in Window CallBack procedure. They signifies parameters of various events. They are used in handing individual events.
We need to write WinMain and need to follow all these in a Win32 application. However we need not to write much if we are writing an application with MFC ...
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