WriteFile 이어쓰기

HANDLE hFile;
DWORD tempByte;
char *pszDir = "C:\\test\\test.txt";

hFile = CreateFile( pszDir,            
                    GENERIC_WRITE,     
                    0,  
                    NULL,
                    OPEN_ALWAYS,
                    FILE_ATTRIBUTE_NORMAL,
                    NULL);
SetFilePointer(hFile,0,NULL,FILE_END);
WriteFile(hFile,buffer,sizeof(char) * buffSize, &tempByte,0);

CloseHandle( hFile );