Exposes methods for enumerating, getting, and setting property values.

IPropertyStore Members

Commit	Saves a property change.
GetAt	Gets a property key from an item's array of properties.
GetCount	Gets the number of properties attached to the file.
GetValue	Gets data for a specific property.
SetValue	Sets a new property value, or replaces or removes an existing value.

Remarks

These methods can be called at any time after initialization of the property handler but before property changes are written to the file through IPropertyStore::Commit. At any other time, these methods return E_FAIL.

When to Implement

An implementation of this interface is provided by CLSID_InMemoryPropertyStore, as IPropertyStoreCache. Users should never need to implement it themselves.

CLSID_InMemoryPropertyStore implements IPropertyStoreCache instead of IPropertyStore so that it can store additional state information (PSC_STATE) about each of the properties in the cache. This information can be useful for property handler implementers. It can also be useful in other scenarios where a cache of property values is needed.

Interface Information

Inherits from	IUnknown
Header and IDL files	propsys.h, propsys.idl
Minimum operating systems	Windows Vista