public void BeginModel(CallbackAsyncComplete aCallback)
{
Invocation invocation = iService.Invocation(iActionModel, aCallback);
int outIndex = 0;
invocation.AddOutput(new ArgumentString((ParameterString)iActionModel.OutputParameter(outIndex++)));
invocation.AddOutput(new ArgumentString((ParameterString)iActionModel.OutputParameter(outIndex++)));
invocation.AddOutput(new ArgumentString((ParameterString)iActionModel.OutputParameter(outIndex++)));
invocation.AddOutput(new ArgumentString((ParameterString)iActionModel.OutputParameter(outIndex++)));
iService.InvokeAction(invocation);
}