IDE Output Window (Need to catch compile errors)

I've written a build tool that reads in a xml file that shows all projects and their dependencies. Does anyone know how to grab the output window so that during a compile I can get any compiler errors? example: System.Type t = System.Type.GetTypeFromProgID("VisualStudio.Solution.7.1"); object obj = System.Activator.CreateInstance(t, true); soln = (EnvDTE.Solution)obj; I'm then doing a soln.solutionbuild(projectname, true); if build fails I want to display why it failed. Thanks in advance everyone. Gibby