How do I access the value of a stored proc return param in c# using executeNonQuery?

I've got a stored proc to insert a record and return the id of the record inserted in an output param.
How do I access this value in my code after the proc is executed?

param = comm.CreateParameter();
param.ParameterName ="@.MemberID";
param.Direction =ParameterDirection.Output;
param.DbType =DbType.Int32;
comm.Parameters.Add(param);

try
{
rowsAffected =GenericDataAccess.ExecuteNonQuery(comm);
}
catch
{
rowsAffected = -1;
}

you should simply be able to access the parameters Value property.

param.Value