Hi, Is there any specific function / method / class for communicating with a Sys file? let me explain what I want to do, I'm writing an Anti-Virus system, the main part is a sys file ( a kernel driver which I'm writing with C language ), well, for communicating with kernel driver the C programmers use DeviceIoControl(), with this function the user-mode program could send or get data from kernel mode program . I want to make my anti-virus with remote-control , For example I can send my commands to the base anti-virus from my office with a web script and see the result back to my web page. Is it possible? could anyone point me to some snippet which can be useful? thnx .