More and more wireless devices are been launched every day. With every new device built, there is a strong need of wireless devices drivers programmers. The device driver programmers are required by the OEMs (original equipment manufacturer — also known as the "hardware guys"). A device driver acts like a translator between the device and programs that use the device. Device drivers are modules that provide the interface between the operating system and the hardware. Each device has its own set of specialized commands that only its driver knows. In contrast, most programs access devices by using generic commands. The driver, therefore, accepts generic commands from a program and then translates them into specialized commands for the device.
Windows CE Device drivers:
Windows CE is the operating system which is used in PDAs and in Mobile devices. All device drivers in Windows CE are dynamic-link libraries (DLLs) and primarily use the standard Windows CE APIs (Win32®-based) in their implementations. This is in contrast to drivers on Windows 2000 and Windows 98 where drivers use the Windows Driver Model (WDM) interfaces and run either in user mode or kernel mode, with special privileges based on what mode they are in. Understanding the Windows CE driver model and developing device driver for Windows CE is generally easier than for Windows 2000 and Windows 98, since the Windows CE driver architecture is significantly less complex than WDM.