IUISimplePropertySet (Interfaces)
Last changed: http---blogs.microsoft.co.il-blogs-arik--85.250.66.240

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Summary
IUISimplePropertySet is a read-only interface that can be implemented by the Windows Ribbon framework and a Ribbon host application, depending on the situation. When implemented by the Ribbon framework, IUISimplePropertySet defines the method for retrieving property key values. In a host application, IUISimplePropertySet is implemented for each item in an item gallery IUICollection object and defines the method for retrieving properties of the selected item.

C# Definition:

// Simple property bag
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("c205bb48-5b1c-4219-a106-15bd0a5f24e2")]
public interface IUISimplePropertySet
{
   // Retrieves the stored value of a given property
   [PreserveSig]
   HRESULT GetValue([In] ref PropertyKey key, [Out()] out PropVariant value);
}

Notes:

None.

Documentation