[This is preliminary documentation and subject to change.]
Retrieves the user's warning threshold for the volume. This threshold is expressed as a text string, for example "10.5 MB". If the user's threshold is unlimited, the string returned is "No Limit" (localized).
HRESULT GetQuotaThresholdText(
  LPWSTR pszText,
  DWORD cchText
);
 This method returns one of the following values.
| Value | Meaning | 
|---|---|
| S_OK | Success. | 
| DQC_E_ACCESS_DENIED | The caller has insufficient access rights. | 
| DQC_E_LOCK_FAILED | Failure to obtain an exclusive lock. | 
| E_OUTOFMEMORY | Insufficient memory. | 
| E_FAIL | Failure reading quota information. | 
  Windows NT: Requires version 5.0 or later.
  Windows: Unsupported.
  Windows CE: Unsupported.
  Header: Declared in dskquota.h.
File Systems Overview, File System Interfaces, IDiskQuotaUser