pub unsafe extern "system" fn WinHttpReadDataEx(
    hrequest: *mut c_void,
    lpbuffer: *mut c_void,
    dwnumberofbytestoread: u32,
    lpdwnumberofbytesread: *mut u32,
    ullflags: u64,
    cbproperty: u32,
    pvproperty: *const c_void
) -> u32