How can I get more than one PDFCreator instances by programing?

2009-01-05 08:51:15 by netcom

I know how to get more than one instances by command-line.
and I try to get the same result by programing but the code do not work.
The following is my code snippet in c#.

string parameters;
parameters = "/NoAbortIfRunning /NoProcessingAtStartup";
if (!_PDFCreator.cStart(parameters, false))
{
string error = "Status: Error[" + pErr.Number + "]: " + pErr.Description;
}

Is anyboy can help me?