How to retrieve data from Non-SAP(windows) to SAP-R3(windows) Appli Server

Hi Team,

I have a requirement that need to get a file from Windows Application server (Non-SAP System) to SAP-R3 system and I need to delete the file from the Non SAP system,this is frequently used by the user.I checked by using RFC functionmodules and IDOC's but these are not suitable for my requirement.Please suggest me if any other function module's or any other way's to fulfill the requirement.

Thanks,

Satya.