void QVolumeFreeSpace::getVolumeFreeSpace(const QString &path) { std::wstring wPath = path.toStdWString(); if (wPath.empty()) return; LPCWSTR lPath = (LPCWSTR)wPath.c_str(); ULARGE_INTEGER uFreeByteAvailable, uTotalByte, uTotalFreeBytes; if (!GetDiskFreeSpaceEx(lPath,&uFreeByteAvailable,&uTotalByte,&uTotalFreeBytes)) return; }