Export from GP and update another database each night

I am new to GP 2010 and I am given a task to export employees payroll data (hourly) from GP and update in another database ( Third party company).

It needs to run this transaction each night.

I am planning to use visual studio ( Which I am good at).

I need some suggestion to get this done.

I don't know what is best way to export data out of GP 2010 automatically each night ( A smart list, IM or excel macro). If any of these application can update other database too would be great.

Please let me know on this.

Thanks in advance.