function Tnt_GetDiskFreeSpaceW(lpRootPathName: PWideChar; var lpSectorsPerCluster: DWORD; var lpBytesPerSector: DWORD; var lpNumberOfFreeClusters: DWORD; var lpTotalNumberOfClusters: DWORD): BOOL;
TNT-WARN GetDiskFreeSpace TNT-WARN GetDiskFreeSpaceA TNT-WARN GetDiskFreeSpaceW