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IWMDMStorageGlobals::GetTotalFree

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The GetTotalFree method retrieves the total amount of free space on the storage medium, in bytes.

Syntax

HRESULT GetTotalFree(DWORD*pdwFreeLow,DWORD*pdwFreeHigh);

Parameters

pdwFreeLow

[out]  Pointer to a DWORD that receives the low-order part of the free space value.

pdwFreeHigh

[out]  Pointer to a DWORD that receives the high-order part of the free space value.

Return Values

The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:

  • Standard COM error codes
  • Windows error codes converted to HRESULT values
  • Windows Media Device Manager error codes

For an extenstive list of possible error codes, see Error Codes.

Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK The method succeeded.
E_INVALIDARG A parameter is an invalid or NULL pointer.
E_FAIL An unspecified error occurred.
WMDM_E_NOTCERTIFIED The caller is not certified

Remarks

To determine the amount of storage space in use by the medium for file management, subtract the number of bad bytes retrieved using GetTotalBad from the number of free bytes retrieved using GetTotalFree.

Requirements

Header: Defined in mswmdm.h.

Library: mssachlp.lib

See Also