Multithreading Multi-Threaded Programming

How does the worker thread get the handle?
} A global variable
} Pass the handle in the AfxBeginThread call
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HWND g_hWndMain = GetSafeHwnd();
AfxBeginThread(
ComputeThreadProc, // The address of the thread function
GetSafeHwnd(), // 32-bit value that passes to the thread function
THREAD_PRIORITY_NORMAL); // The desired priority of the thread
Note: Why not pass the C++ window pointer instead?
Doing so would be dangerous because you can’t depend on the
continued existence of the object and you’re not allowed to share
objects of MFC classes among threads. (This rule does not apply to
objects derived directly from CObject or to simple classes such as CRect and
CString.).
Advanced Windows Network Programming
11/11/12