please help:about the asynchronous operator   

I have pay lots time on the asynchonous operator.
the code is as below,
HANDLE hConnectedEvent,  hRequestCompleteEvent;
BOOL bAllDone = FALSE;
HINTERNET hsession, hinternet;

void __stdcall Callback(HINTERNET hInternet,
			DWORD dwContext,
			DWORD dwInternetStatus,
			LPVOID lpStatusInfo,
			DWORD dwStatusInfoLen);

int main(int argc, char* argv[])
{
	hConnectedEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

	hRequestCompleteEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

	hsession = InternetOpen(_T("ASYNCNET.exe"),
INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, INTERNET_FLAG_ASYNC);

	if (hsession == NULL )
	{
		cout<<"error occur ! the InternetOpen function\n";
		return 1;
	}

	if ( InternetSetStatusCallback(hsession,
(INTERNET_STATUS_CALLBACK)Callback ) ==
INTERNET_INVALID_STATUS_CALLBACK)
	{
		InternetCloseHandle(hsession);
		cout<<"error happen at the internetsetstatuscallback fuction n";
		cout<<"the error is "<< GetLastError()<<endl;
		return 1;
	}

	hinternet = InternetOpenUrl(hsession, _T("http://www.google.com"),
NULL, 0, INTERNET_FLAG_RELOAD | INTERNET_FLAG_PRAGMA_NOCACHE |
INTERNET_FLAG_NO_CACHE_WRITE |INTERNET_FLAG_KEEP_CONNECTION, 1);

	if ( hinternet == NULL)
	{
		if (GetLastError() != ERROR_IO_PENDING)
		{
			InternetCloseHandle(hsession);
			cout<<"internetOpenUrl fails,the error code is
"<<GetLastError()<<endl;
			return 1;
		}
		WaitForSingleObject(hConnectedEvent, INFINITE);
	}

	BYTE lpReadBuff[256];
	BOOL bOk;

	do
	{
		INTERNET_BUFFERS InetBuff;
		ZeroMemory(&InetBuff, sizeof(InetBuff));
		InetBuff.dwStructSize = sizeof(InetBuff);
		InetBuff.lpvBuffer = lpReadBuff;
		InetBuff.dwBufferLength = sizeof(lpReadBuff) - 1;

		bOk = InternetReadFileEx(hinternet, &InetBuff,	0, 2);

		if ( bOk == FALSE)
		{
			if (GetLastError() == ERROR_IO_PENDING)
			{
				WaitForSingleObject(hRequestCompleteEvent, INFINITE);
			}
			else
			{

				cout << "InternetReadFileEx failed, error " <<
GetLastError()<<endl<<endl<<endl;
				cout.flush();
				return 1;
			}
		}

		lpReadBuff[InetBuff.dwBufferLength] = 0;
		cout << lpReadBuff<<endl;
		cout.flush();

		if (InetBuff.dwBufferLength == 0)
			bAllDone = TRUE;


	} while (bAllDone == FALSE);

	CloseHandle(hConnectedEvent);
	CloseHandle(hRequestCompleteEvent);
	InternetCloseHandle(hinternet);
	InternetCloseHandle(hsession);
	return 0;
}

void __stdcall Callback(HINTERNET hInternet,
			DWORD dwContext,
			DWORD dwInternetStatus,
			LPVOID lpStatusInfo,
			DWORD dwStatusInfoLen)
{

	switch(dwContext)
	{
	case 1: // Connection handle
		if (dwInternetStatus == INTERNET_STATUS_HANDLE_CREATED)
		{
			INTERNET_ASYNC_RESULT *pRes = (INTERNET_ASYNC_RESULT
*)lpStatusInfo;
			hinternet = (HINTERNET)pRes->dwResult;

			cout << "connect success!!!!" << endl;
			cout.flush();

			SetEvent(hConnectedEvent);
		}
		break;
	case 2: // Request handle

		if (dwInternetStatus ==INTERNET_STATUS_REQUEST_COMPLETE)
		{
			INTERNET_ASYNC_RESULT *pAsyncRes = (INTERNET_ASYNC_RESULT
*)lpStatusInfo;
			cout << "Function call finished" << endl;
			cout << "dwResult: " << pAsyncRes->dwResult << endl;
			cout << "dwError:  " << pAsyncRes->dwError << endl;
			cout.flush();
			SetEvent(hRequestCompleteEvent);
		}
	}
}

=======================================================================
I found the bOk = InternetReadFileEx(hinternet, &InetBuff,	0, 2);
then bOk == FALSE ,and the lasterror is
12019(ERROR_INTERNET_INCORRECT_HANDLE_STATE )

and I change some flag(using function InternetOpenUrl) ,the callback
function can't arrive the switch 's case 2!
how this happen?
please help me
thank you!

date: Mon, 18 Aug 2008 03:02:01 -0700 (PDT)   author:   dabang