The touch screen driver reads input from touch screen hardware and converts it to touch Events that are sent to the input system. The driver is also responsible for converting uncalibrated coordinates
RAM Disk Driver with custom BoundsChecker Events
This sample illustrates how to add custom BoundsChecker Events to a DDK driver.
It links to the kchecker library and has several BOUNDSCHECKER() calls in it.
This sample is a software only Windows NT Device Driver. This driver
is provided for educational purposes only. Generally the Windows NT cache
manager does a much better job of optimizing memory usage than using a RAM disk.
Handheld electronic devices play a key role in our everydaylives. Because dependability is paramount, handhelds arecarefully engineered with lightweight power sources forreliable use under normal conditions. But no amount ofcareful engineering can prevent the mistreatment theywill undergo at the hands of humans. For example, whathappens when a factory worker drops a bar code scanner,causing the battery to pop out? Such Events areelectronically unpredictable, and important data storedin volatile memory would be lost without some form ofsafety net—namely a short-term power holdup systemthat stores suffi cient energy to supply standby power untilthe battery can be replaced or the data can be stored inpermanent memory.