importing data into navision 5.0

Hi,

I have a task to import daily collections from web service into navision 5.0 SP1. Could someone suggest a best way of doing it in .NET.

I'm thinking of 2 ways

1. Using C/Front post the data into voucher table. I'm not clear on any implications because of this.

2.Using C/Front post the import data to a temp table and invoke a code unit to post the data into vouchers. In this approach I'm not clear on how to invoke codeunit from an executable sitting outside of Navision.

Please advice...

Thanks in advance,

Sudhakar