[Protected Storage (Pstore) is available for use in Windows Server 2003 and Windows XP. It is only available for read-only operations in Windows Server 2008 and Windows Vista, but may be unavailable in subsequent versions. Pstore uses an older implementation of data protection. Developers are strongly encouraged to take advantage of the stronger data protection provided by the CryptProtectData and CryptUnprotectData functions.]
Reads the specified data item from protected storage.
HRESULT ReadItem( [in] PST_KEY Key, [in] const PSGUID *pItemType, [in] const GUID *pItemSubtype, [in] LPCWSTR *szItemName, [in] DWORD cbData, [in] BYTE_RPC_FAR *pbData, [in] PPST_PROMPTIFO pPromptInfo, [in] DWORD dwFlags );
- Key [in]
The provider storage area.
The storage is maintained in the current user section of the registry.
The storage is maintained in the local machine section of the registry.
- pItemType [in]
A pointer to a GUID that identifies the data type of the item to read.
- pItemSubtype [in]
A pointer to a GUID that identifies the data subtype of the item to read.
- szItemName [in]
A pointer to a string that contains the name assigned to the stored data item.
- cbData [in]
A DWORD that indicates the size of the buffer that contains the stored data item.
- pbData [in]
A pointer to a buffer that contains the stored data item.
- pPromptInfo [in]
A pointer to a PST_PROMPTINFO structure.
- dwFlags [in]
Specifies user interface and security behaviors for the read operation.
The flag values can be combined with a logical OR.
The return value is an HRESULT value. A value of PST_E_OK indicates the function was successful.
If ReadItem completes successfully, the application is responsible for freeing the returned data buffer using the CoTaskMemFree function.