Passing SQL Parameters to Stored Procedure

However, I do not know how to create the parameter collection to pass and can not find any examples anywhere.

I know I can do something like this below but the ExecuteStoredProcedureNonQuery creates the Command for me.

IDbCommand Command = CreateCommand("ww_GetStoreMessage");
Command.CommandType = System.Data.CommandType.StoredProcedure;
Command.Parameters.Add(CreateParameter("StorePK", tnStorePk, ParameterDirection.Input));
Command.Parameters.Add(CreateParameter("StoreMessage", ParameterDirection.Output));

How do you create a IDataParameterCollection (I guess) to pass "params IDbDataParameter[] Parameters"?

Thanks, Craig