These days have seen "core programming", which should look at the CE program design.
Pay attention to drive and serial communication now:
Windows CE divides the device driver into two major groups: local device drivers and flow devices drivers.
The device driver under CE operates on the same protection level as the application. The difference from the application is that they are DLLs.
Understanding what driver is loaded in the CE system is to observe the contents of the / driver / active key under HKEY_LOCAL_MACHINE in the registry.
