Microsoft.VisualStudio.Project.BuildableProjectConfig.NotifyBuildBegin C# (CSharp) Method

        private bool NotifyBuildBegin()
        {
            int shouldContinue = 1;
            foreach (IVsBuildStatusCallback cb in callbacks)
            {
                try
                {
                    ErrorHandler.ThrowOnFailure(cb.BuildBegin(ref shouldContinue));
                    if (shouldContinue == 0)
                    {
                        return false;
                    }
                }
                catch (Exception e)
                {
                    // If those who ask for status have bugs in their code it should not prevent the build/notification from happening
                    Debug.Fail(String.Format(CultureInfo.CurrentCulture, SR.GetString(SR.BuildEventError, CultureInfo.CurrentUICulture), e.Message));
                }
            }

            return true;
        }