GetDiskSpaceInformationA function (fileapi.h)

Gets disk space information for a volume at a given root path.

Syntax

HRESULT GetDiskSpaceInformationA(
  LPCSTR                 rootPath,
  DISK_SPACE_INFORMATION *diskSpaceInfo
);

rootPath

A pointer to a string that contains the root directory of the volume to be queried.

If this parameter is NULL, the function uses the root of the current disk.

diskSpaceInfo

A DISK_SPACE_INFORMATION structure containing information about the current disk space for the volume at the given root path.

Returns S_OK if the function succeeds, or a value from Common HRESULT Values if it fails. You can call GetLastError for extended error information.

The rootPath must be a root path, such as C:\ or D:\, and not a subdirectory of a root path.

Requirement	Value
Minimum supported client	Windows 10 Build 17763 [desktop apps \| UWP apps]
Minimum supported server	Windows 10 Server 2019 [desktop apps \| UWP apps]
Header	fileapi.h (include Windows.h)
Library	kernel32.lib
DLL	kernel32.dll