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Exposes methods that get property descriptions, register and unregister property schemas, enumerate property descriptions, and format property values in a type-strict way.
Inheritance
The IPropertySystem interface inherits from the IUnknown interface. IPropertySystem also has these types of members:
Methods
The IPropertySystem interface has these methods.
| IPropertySystem::EnumeratePropertyDescriptions Gets an instance of the subsystem object that implements IPropertyDescriptionList, to obtain either the entire or a partial list of property descriptions in the system. |
| IPropertySystem::FormatForDisplay Gets a formatted, Unicode string representation of a property value. (IPropertySystem.FormatForDisplay) |
| IPropertySystem::FormatForDisplayAlloc Gets a string representation of a property value to an allocated memory buffer. |
| IPropertySystem::GetPropertyDescription Gets an instance of the subsystem object that implements IPropertyDescription, to obtain the property description for a given PROPERTYKEY. |
| IPropertySystem::GetPropertyDescriptionByName Gets an instance of the subsystem object that implements IPropertyDescription, to obtain the property description for a given canonical name. |
| IPropertySystem::GetPropertyDescriptionListFromString Gets an instance of the subsystem object that implements IPropertyDescriptionList, to obtain an ordered collection of property descriptions, based on the provided string. |
| IPropertySystem::RefreshPropertySchema Not supported. (IPropertySystem.RefreshPropertySchema) |
| IPropertySystem::RegisterPropertySchema Informs the schema subsystem of the addition of a property description schema file. (IPropertySystem.RegisterPropertySchema) |
| IPropertySystem::UnregisterPropertySchema Informs the schema subsystem of the removal of a property description schema (.propdesc) file, using a file path to the .propdesc file on the local machine. |
Remarks
Many of the exported APIs (such as PSGetPropertyDescription) are simply wrappers around the IPropertySystem methods. If your code calls a lot of these helper APIs in sequence, it may be worthwhile to instantiate a single IPropertySystem object, and call the methods directly, rather than calling the helper APIs. (To improve the performance, the helper APIs do obtain a cached instance of the IPropertySystem object.)
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP with SP2, Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2003 with SP1 [desktop apps only] |
| Target Platform | Windows |
| Header | propsys.h |
| Redistributable | Windows Desktop Search (WDS) 3.0 |