Understanding The COM Single-Threaded Apartment Part 2

// ComThread.cpp
#include "ComThread.h"





DWORD ThreadMsgWaitForSingleObject (HANDLE hHandle, DWORD dwMilliseconds)
{
  HANDLE	dwChangeHandles[1] = { hHandle };
  DWORD		dwWaitStatus = 0;
  DWORD		dwRet = 0;
  bool		bContinueLoop = true;

  // Msg Loop while waiting for hHandle to be signaled.
  while (bContinueLoop) 
  {
    // Wait for notification.
    dwWaitStatus = ::MsgWaitForMultipleObjectsEx
	(
      (DWORD)1,          // number of handles in array
      dwChangeHandles, // object-handle array
      (DWORD)dwMilliseconds,  // time-out interval
      (DWORD)(QS_ALLINPUT | QS_ALLPOSTMESSAGE),      // input-event type
      (DWORD)(MWMO_INPUTAVAILABLE)          // wait options
    );
 
    switch (dwWaitStatus) 
    { 
      // First wait (hHandle) object has been signalled.
	  case WAIT_OBJECT_0 : 
	  {
	    dwRet = dwWaitStatus;
        // Flag to indicate stop loop.
		bContinueLoop = false;
	    break;
	  }

      // Windows message has arrived.
      case WAIT_OBJECT_0 + 1: 
	  {
	    MSG msg;

        // Dispatch all windows messages in queue.
	    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
	    {
	      TranslateMessage (&msg);
		  DispatchMessage(&msg);
	    }

	    break; 
	  }

      // Timeout has elapsed.
	  case WAIT_TIMEOUT :
	  {
	    dwRet = dwWaitStatus;
        // Flag to indicate stop loop.
		bContinueLoop = false;
	    break;
	  }
 
      default: 
	  {
	    break;
	  }
    } 
  }

  return dwRet;
}