internal static IntPtr OpenDeviceIO(string devicePath, DeviceMode deviceMode, uint deviceAccess)
{
var security = new NativeMethods.SECURITY_ATTRIBUTES();
var flags = 0;
if (deviceMode == DeviceMode.Overlapped) flags = NativeMethods.FILE_FLAG_OVERLAPPED;
security.lpSecurityDescriptor = IntPtr.Zero;
security.bInheritHandle = true;
security.nLength = Marshal.SizeOf(security);
return NativeMethods.CreateFile(devicePath, deviceAccess, NativeMethods.FILE_SHARE_READ | NativeMethods.FILE_SHARE_WRITE, ref security, NativeMethods.OPEN_EXISTING, flags, 0);
}
void CreateOverlappedEvent(out NativeMethods.SECURITY_ATTRIBUTES security, out NativeMethods.OVERLAPPED overlappedEvent)
{
security = new NativeMethods.SECURITY_ATTRIBUTES
{
lpSecurityDescriptor = IntPtr.Zero,
bInheritHandle = true,
nLength = Marshal.SizeOf(cancelEventSecurity)
};
overlappedEvent = new NativeMethods.OVERLAPPED
{
Offset = 0,
OffsetHigh = 0,
hEvent = NativeMethods.CreateEvent(ref cancelEventSecurity, Convert.ToInt32(true), Convert.ToInt32(false), string.Empty)
};
}