怎么作到让一个空指针指向一个函数？并且向函数那样调用他??

怎么作到让一个空指针指向一个函数？并且向函数那样调用他??

DWORD CALLBACK CopyProgressProc(
LARGE_INTEGER TotalFileSize,
LARGE_INTEGER TotalBytesTransferred,
LARGE_INTEGER StreamSize,
LARGE_INTEGER StreamBytesTransferred,
DWORD dwStreamNumber,
DWORD dwCallbackReason,
HANDLE hSourceFile,
HANDLE hDestinationFile,
LPVOID lpData
);


//---------------------------------------------------------------------------
// 文件拷贝线程
//---------------------------------------------------------------------------
DWORD WINAPI CopyFile_ThreadProc(LPVOID pParam)
{
COPY_FILE_THREAD_DATA *pCopyFileThreadData = (COPY_FILE_THREAD_DATA *)pParam;

const int BUFFER_SIZE = 1024 * 100;
char szBuf[BUFFER_SIZE] = {0};

CFile srcFile;
CFile destFile;
CFileException e;
CString strSrcFileName = pCopyFileThreadData->pExistingFileName;
CString strDestFileName = pCopyFileThreadData->pNewFileName;

if(!srcFile.Open(strSrcFileName, CFile::modeRead))
{
CString strErrorInfo;
strErrorInfo.Format("读取文件%s出错: %d", e.m_cause);
return -1;
}

if(!destFile.Open(strDestFileName, CFile::modeCreate | CFile::modeWrite, &e))
{
CString strErrorInfo;
strErrorInfo.Format("创建文件%s时发生错误: %d", e.m_cause);
return -1;
}

DWORD dwFileLen = srcFile.GetLength();
DWORD dwReadTotalSize = 0;

while(dwReadTotalSize < dwFileLen)
{
DWORD dwReadSize = srcFile.Read(szBuf, BUFFER_SIZE * sizeof(char));
destFile.Write(szBuf, dwReadSize * sizeof(char));
dwReadTotalSize += dwReadSize;

}

srcFile.Close();
destFile.Close();

return 0;
}


BOOL CopyFileWithProgress(
const char *pExistingFileName,
const char *pNewFileName,
void *pCopyProgressProc,
void *pData,
bool bCancel,
DWORD dwCopyFlags
)
{
DWORD dwThreadID = 0;
HANDLE hThread = CreateThread(NULL,
NULL,
CopyFile_ThreadProc,
(LPVOID)pCopyProgressProc,
NULL,
&dwThreadID);

if(hThread == NULL)
{
return FALSE;
}

return TRUE;
}

我想在Thread_Proc里面调用DWORD CALLBACK CopyProgressProc(...)这个函数，如果传参数？谢谢！