If you are running LabVIEW 7.1, look into LabVIEW 7.1\examples\com\dotnet\SimpleTaskMonitor.llb VI. I think this is probably the easiest way for you to get things work without writing a lot of C++ wrapper code for LabVIEW.
Now you do need to install .NET Framework (free download from Microsoft website) on your machine to make this VI run.