explanation of some statements in Windows CE

Forum: WinCE
Jorge Moreno Serrano 
Good day.
I've been looking at several example programs for LED, PWM, etc. .. but
within these programs there are some lines of code I do not understand its
operation, someone could help me with this ..

lines of code are:

* Hport = CreateFile ("LED1", GENERIC_READ Or GENERIC_WRITE, 0,
IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero)
  * DeviceIoControl (hport, LED_All_ON, Nothing, 0, Nothing, 0, 0,
IntPtr.Zero)
* Hport = CreateFile ("PWM1:", GENERIC_READ Or GENERIC_WRITE, 0,
IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero)
* If (hport = INVALID_HANDLE_VALUE) Then
             MsgBox ("LED1 Driver Open Fail")
         End If
           
What does each line of code?

thank you very much

domodom 
Hello, 
Drivers like LED or PWM are stream drivers.
A stream driver is accessed with the CreateFile function that returns a
handle to the driver.
With this handle, you can send IOCTL commands to the driver with the
DeviceIoControl function.
domodom