Example device driver code

 · The following code example shows the client driver's EvtCleanupCallback event callback implementation. VOID MyUSBDriver_EvtDriverContextCleanup(_In_ WDFDRIVER Driver) { UNREFERENCED_PARAMETER(Driver); PAGED_CODE (); TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC!  · These audio devices are embedded in the system (not pluggable) and the driver uses WaveRT for rendering these devices. The driver also uses a "virtual audio device" instead of an actual hardware-based adapter. Driver developers can use the framework in this sample to provide support for various audio devices without concern for hardware.  · User-mode Device Driver – Other than the devices which are brought by kernel for working of the system the user also bring some devices for use during the using of a system that devices needs device drivers to functions those drivers falls under User mode device driver. For example user needs any plug and play action that comes under this Estimated Reading Time: 2 mins.

User-mode Device Driver – Other than the devices which are brought by kernel for working of the system the user also bring some devices for use during the using of a system that devices needs device drivers to functions those drivers falls under User mode device driver. For example user needs any plug and play action that comes under this. NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegistryPath) { NTSTATUS NtStatus = STATUS_SUCCESS; UINT uiIndex = 0; PDEVICE_OBJECT pDeviceObject = NULL; UNICODE_STRING usDriverName, usDosDeviceName; DbgPrint(" DriverEntry Called \r "); RtlInitUnicodeString(usDriverName, L " \\Device\\Example"); RtlInitUnicodeString(usDosDeviceName, L " \\DosDevices\\Example"); NtStatus = IoCreateDevice(pDriverObject, 0, usDriverName, FILE_DEVICE_UNKNOWN, FILE_DEVICE_SECURE_OPEN. These audio devices are embedded in the system (not pluggable) and the driver uses WaveRT for rendering these devices. The driver also uses a "virtual audio device" instead of an actual hardware-based adapter. Driver developers can use the framework in this sample to provide support for various audio devices without concern for hardware.

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