关于DebugAPI调试程序问题

[plane_more]

下面是我写的代码，但是不止为何在加载了被调试程序后，被调试程序始终被挂起，调试程序也一直在等待调试事件，求大神指点下

#include <Windows.h>
#include <iostream>
TCHAR szName[] = TEXT("f://primer.exe");
int main() 
{
	//加载被调试进程
	HANDLE hProcess, hThread;
	DWORD threadID, processID;
	DEBUG_EVENT dEvent;
	STARTUPINFO si;
	memset(&si, 0, sizeof(STARTUPINFO));
	si.cb = sizeof(STARTUPINFO);
	si.dwFlags = STARTF_USESHOWWINDOW;
	si.wShowWindow = SW_SHOW;
	PROCESS_INFORMATION pi;
	CreateProcess(NULL, szName, NULL, NULL,NULL,DEBUG_PROCESS|DEBUG_ONLY_THIS_PROCESS, NULL, NULL, &si, &pi);
	hProcess = pi.hProcess;
	hThread = pi.hThread;
	processID = pi.dwProcessId;
	threadID = pi.dwThreadId;
	//接收调试事件

	while (WaitForDebugEvent(&dEvent, INFINITE)) 
	{
		switch (dEvent.dwDebugEventCode)
		{
		case EXCEPTION_DEBUG_EVENT:
			switch (dEvent.u.Exception.ExceptionRecord.ExceptionCode)
			{
			case EXCEPTION_BREAKPOINT:
				MessageBoxA(NULL, "INT 3", "EXCEPTION", 0);
				break;
			case EXCEPTION_SINGLE_STEP:
				MessageBoxA(NULL, "F7", "EXCEPTION", 0);
				break;
			}
		}
		ContinueDebugEvent(processID, threadID, DBG_CONTINUE);
	}
	return 0;
}

[赵4老师]

参考MSDN98自带的例子DRWATSON？ MSDN98\SAMPLES\VC98\SDK\SDKTOOLS\IMAGE\DRWATSON\*.* MSDN98_1.ISO http://pan.baidu.com/s/1dDF41ix, MSDN98_2.ISO http://pan.baidu.com/s/1bnGo0Vl