LanguageService GUID in IVsDebugger.InsertBreakpointByName()

Hi,

I want to call this API

IVsDebugger.InsertBreakpointByName()

but I don't know what value I should use for the first parameter.  The doc says it's "The GUID for the language service such as SID_SVisualBasicLangService.". But I cannot find where SID_SVisualBasicLangService is defined. Anyway, what I need is the GUID for Visual C++.

Thanks !