socket传送文件，允许多客户端同时访问，为什么这句代码总运行出错？

[triumphalist]

//********************************************************************
sockSrvr.Accept(sockRecv);
//********************************************************************





// ServerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Server.h"
#include "ServerDlg.h"
//#include "PThread.h"
//#include "PThread.cpp"


#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
#define WINTHREAD unsigned __stdcall
/////////////////////////////////////////////////////////////////////////////
// CServerDlg dialog
// PThread p;
CSocket sockSrvr;
DWORD WINAPI StartSock();
WINTHREAD StartCopy(LPVOID lpParameter);
CString filename;
CFileDialog Dlg(true);
CServerDlg::CServerDlg(CWnd* pParent /*=NULL*/)
: CDialog(IDD, pParent)
{
//{{AFX_DATA_INIT(CServerDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

//CFileDialog Dlg(TRUE);

//CSocket sockRecv;

void CServerDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CServerDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CServerDlg, CDialog)
//{{AFX_MSG_MAP(CServerDlg)
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON_LICSEN, OnButtonLicsen)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CServerDlg message handlers

BOOL CServerDlg::OnInitDialog()
{
CDialog::OnInitDialog();

// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

return TRUE; // return TRUE unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.

void CServerDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting

SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}

// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CServerDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}

void CServerDlg::OnButtonLicsen()
{
//HANDLE id_thread;
//unsigned long m_thread;
//id_thread=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)StartSock,(void *)this,0,&m_thread);

filename="c:\\temp\\data1.cab";
//if(Dlg.DoModal()!=IDOK)
//return 0;
sockSrvr.Create(800);
sockSrvr.Listen();
for(int i=0;i<1;i++)
{
HANDLE id_thread;
unsigned long m_thread;
id_thread=CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)StartCopy,0,0,&m_thread);
}
}
DWORD WINAPI StartSock()
{
return 0;

}
//
WINTHREAD StartCopy(LPVOID lpParameter)
{

CSocket sockRecv;



//********************************************************************
sockSrvr.Accept(sockRecv);
//********************************************************************

CFile myFile;

if(!myFile.Open(filename, CFile::modeRead | CFile::typeBinary))
{
AfxMessageBox("文件不存在!",MB_OK|MB_ICONERROR);
return 0;
}
SOCKET_STREAM_FILE_INFO StreamFileInfo;
WIN32_FIND_DATA FindFileData;

FindClose(FindFirstFile(filename,&FindFileData));
memset(&StreamFileInfo,0,sizeof(SOCKET_STREAM_FILE_INFO));
strcpy(StreamFileInfo.szFileTitle,myFile.GetFileTitle());

StreamFileInfo.dwFileAttributes = FindFileData.dwFileAttributes;
StreamFileInfo.ftCreationTime = FindFileData.ftCreationTime;
StreamFileInfo.ftLastAccessTime = FindFileData.ftLastAccessTime;
StreamFileInfo.ftLastWriteTime = FindFileData.ftLastWriteTime;
StreamFileInfo.nFileSizeHigh = FindFileData.nFileSizeHigh;
StreamFileInfo.nFileSizeLow = FindFileData.nFileSizeLow;
char *path="1234";
sockRecv.Receive(path,sizeof(path));
sockRecv.Send(&StreamFileInfo,sizeof(SOCKET_STREAM_FILE_INFO));
UINT dwRead=0;
while(dwRead<StreamFileInfo.nFileSizeLow)
{
byte* data = new byte[1024];
UINT dw=myFile.Read(data, 1024);
sockRecv.Send(data, dw);
dwRead+=dw;
}
myFile.Close();
sockRecv.Close();

return 0;
}

[triumphalist]

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