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A return value that indicates that the member being invoked interprets string arguments according to the Locale ID (LCID), and the LCID is not recognized. If the LCID is not needed to interpret arguments, this error should not be returned.

Namespace:  Microsoft.VisualStudio
Assembly:  Microsoft.VisualStudio.Shell.10.0 (in Microsoft.VisualStudio.Shell.10.0.dll)

public const int DISP_E_UNKNOWNLCID