[C#]
    bool ClientAuthentication;

[VB.NET]
    Property ClientAuthentication As Boolean

[Pascal]
    property ClientAuthentication : boolean;

[VB6]
    Property IElExtendedKeyUsageExtensionX.ClientAuthentication As Boolean

[ActiveX]
    HRESULT _stdcall IElExtendedKeyUsageExtensionX.ClientAuthentication([out, retval] VARIANT_BOOL * Value );
    HRESULT _stdcall IElExtendedKeyUsageExtensionX.ClientAuthentication([in] VARIANT_BOOL Value );

[DLL]
    not implemented;