How to Call a Workflow 4.0 Activity Located in another Activity Library (DLL) Synchronously?

Question

I have a Workflow 4.0 Service that is calling Activities located in an Activity Library (DLL). The problem is that after calling the Activity located in the Activity Library project, execution does not return to the parent workflow service, i.e. the call is asynchronous. However, I want it to be synchronous so that I can check the return value to see if the call was successfull or not. Is there a simple example that demonstrates how to do this?

Thanks,

Leo Cono, http://www.YouLoveMe.com - Get Paid To Date!