QueueUserAPC()强制线程退出等待状态

#include "stdafx.h"

volatile long nCount(0);

VOID WINAPI APCFunc(ULONG_PTR dwParam)
{
	printf("回调函数调用计数:%d\n",nCount++);
}

UINT WINAPI ThreadFunc(void* arg)
{
	HANDLE hEvent = (HANDLE)arg;

	DWORD dwRet = WaitForSingleObjectEx(hEvent,INFINITE,TRUE);

	if (dwRet == WAIT_OBJECT_0)
	{
		printf("hEvent被触发！\n");
	}

	if (dwRet == WAIT_IO_COMPLETION)
	{
		printf("APC项被添加到APC队列中,被触发！\n");
	}

	return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{
	printf("进入主线程！\n");

	HANDLE hEvent = CreateEvent(NULL,TRUE,FALSE,NULL);

	HANDLE hThread = (HANDLE) _beginthreadex(NULL,0,ThreadFunc,(void*)hEvent,0,NULL);
	//hThread = (HANDLE) _beginthread(ThreadFunc,10240,(void*)hEvent);

	Sleep(5000);

	printf("开始抛APC项到线程队列中！\n");

	QueueUserAPC(APCFunc,hThread,NULL);

	WaitForSingleObject(hThread,INFINITE);

	CloseHandle(hThread);
	
	CloseHandle(hEvent);

	printf("退出主线程！\n");

	system("pause");

	return 0;
}

进入主线程！
开始抛APC项到线程队列中！
回调函数调用计数:0
APC项被添加到APC队列中,被触发！
退出主线程！
请按任意键继续. . .