CString GetCurrentDir(void)
{
    TCHAR sDrive[_MAX_DRIVE];
    TCHAR sDir[_MAX_DIR];
    TCHAR sFilename[_MAX_FNAME];
    TCHAR Filename[_MAX_FNAME];
    TCHAR sExt[_MAX_EXT];
    
    GetModuleFileName(AfxGetInstanceHandle(),Filename,_MAX_PATH);
    _tsplitpath(Filename,sDrive,sDir,sFilename,sExt);
    CString HomeDir(CString(sDrive)+CString(sDir));    
    if (HomeDir.GetAt(HomeDir.GetLength()-1)!=_T('\\'))
        HomeDir+=_T('\\');
    return HomeDir;
}
这个方法是什么意思

    char path[256];
    sprintf(path, "%splaylist1.txt", GetCurrentDir());
//又是什么意思
    result = AddWindowEx(iCom, iAddress, iSchedule, 0, 0, 128, 32, path);
    if (!result)
        AfxMessageBox("设置播放数据playlist1.txt失败");