GetVolumeInformationW

function GetVolumeInformationW(

  lpRootPathName: LPCWSTR;

  lpVolumeNameBuffer: LPWSTR;

  nVolumeNameSize: DWORD;

  lpVolumeSerialNumber: LPDWORD;

  var lpMaximumComponentLength: DWORD;

  var lpFileSystemFlags: DWORD;

  lpFileSystemNameBuffer: LPWSTR;

  nFileSystemNameSize: DWORD

):BOOL;