IWiaPropertyStorage interface (wia_xp.h)

The IWiaPropertyStorage interface is used to access information about the IWiaItem object's properties. Applications must query an item to obtain its IWiaPropertyStorage interface.

Inheritance

The IWiaPropertyStorage interface inherits from the IUnknown interface. IWiaPropertyStorage also has these types of members:

Methods

The IWiaPropertyStorage interface has these methods.

IWiaPropertyStorage::GetCount The IWiaPropertyStorage::GetCount method returns the number of properties stored in the property storage.
IWiaPropertyStorage::GetPropertyAttributes The IWiaPropertyStorage::GetPropertyAttributes method retrieves access rights and legal value information for a specified set of properties.
IWiaPropertyStorage::GetPropertyStream The IWiaPropertyStorage::GetPropertyStream method retrieves the property stream of an item.
IWiaPropertyStorage::SetPropertyStream The IWiaPropertyStorage::SetPropertyStream sets the property stream of an item in the tree of IWiaItem objects of a Windows Image Acquisition (WIA) hardware device.

Remarks

The IWiaPropertyStorage interface includes several methods that are very similar to the following methods from the IPropertyStorage interface. The descriptions and remarks for the IPropertyStorage version of these methods applies to the IWiaPropertyStorage as well.

IPropertyStorage Methods	Description
IPropertyStorage::ReadMultiple	Reads property values in a property set.
IPropertyStorage::WriteMultiple	Writes property values in a property set.
IPropertyStorage::DeleteMultiple	Deletes properties in a property set.
IPropertyStorage::ReadPropertyNames	Gets string names that correspond to given property identifiers.
IPropertyStorage::WritePropertyNames	Creates or changes string names that corresponds to given property identifiers.
IPropertyStorage::DeletePropertyNames	Deletes string names for given property identifiers.
IPropertyStorage::SetClass	Assigns a CLSID to the property set.
IPropertyStorage::Commit	As in IStorage::Commit, flushes or commits changes to the property storage object.
IPropertyStorage::Revert	When the property storage is opened in transacted mode, discards all changes since the last commit.
IPropertyStorage::Enum	Creates and gets a pointer to an enumerator for properties within this set.
IPropertyStorage::Stat	Receives statistics about this property set.
IPropertyStorage::SetTimes	Sets modification, creation, and access times for the property set.

 

The IWiaPropertyStorage interface, like all Component Object Model (COM) interfaces, inherits the IUnknown interface methods.

IUnknown Methods	Description
IUnknown::QueryInterface	Returns pointers to supported interfaces.
IUnknown::AddRef	Increments reference count.
IUnknown::Release	Decrements reference count.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional, Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	wia_xp.h (include Wia.h)

See also

IPropertyStorage