Hi Sergey, thanks for answering.
I'm using Winfax 10.0
Microsoft fax service can be a good option if it has some conditions:

.- Having SDK or API to use it from VFP
.- Documentation of this API
.- Will works with W2003 too?
.- Can be used as a printer driver too?

>What WinFax version are you using? Did you consider using Fax service that comes with Win2K?
>
>>Does anyone use winfax with VFP and W2k?
>>I have new problems sending mass faxes with winfax and VFP. The 'send screen' appears to tell winfax the fax number which i have yet configured by code.
>>Any idea?
>>TIA