IVsUserContextItemProvider.SetProperty Method (Int32, Object)
Visual Studio 2015
Sets the specified property.
Assembly: Microsoft.VisualStudio.Shell.Interop (in Microsoft.VisualStudio.Shell.Interop.dll)
From context.idl:
HRESULT IVsUserContextItemProvider::SetProperty( [in] VSCIPPROPID property, in] VARIANT var );
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