WM_INPUT and raw input

[Nephiroth]

I got this piece of code, but it keeps giving me: RAWINPUTDEVICE not declared, while msdn says its declared in winuser.h, I included that, and it still doesnt work.Why?

RAWINPUTDEVICE Rid[2];

Rid[0].usUsagePage = 01h; 
Rid[0].usUsage = 05h; 
Rid[0].dwFlags = 0;                 // adds game pad


if (RegisterRawInputDevices(Rid, 2, sizeof(Rid[0])) == FALSE) {
    //registration failed. Call GetLastError for the cause of the error.
}