programming windows driver mode源代码

				// Control.cpp -- IOCTL handlers for pnpevent driver
				// Copyright (C) 1999 by Walter Oney
				// All rights reserved
				
				#include "stddcls.h"
				#include "driver.h"
				#include "ioctls.h"
				#include "guids.h"
				
				struct _RANDOM_NOTIFICATION : public _TARGET_DEVICE_CUSTOM_NOTIFICATION
					{
					WCHAR text[14];
					};
				
				typedef struct _RANDOM_NOTIFICATION RANDOM_NOTIFICATION, *PRANDOM_NOTIFICATION;
				
				// From NTDDK.H (missing from beta-3 DDK?)
				
				extern "C"
				NTKERNELAPI
				NTSTATUS
				IoReportTargetDeviceChangeAsynchronous(
				    IN PDEVICE_OBJECT PhysicalDeviceObject,
				    IN PVOID NotificationStructure,  // always begins with a PLUGPLAY_NOTIFICATION_HEADER
				    IN PDEVICE_CHANGE_COMPLETE_CALLBACK Callback,       OPTIONAL
				    IN PVOID Context    OPTIONAL
				    );
				
				///////////////////////////////////////////////////////////////////////////////
				
				#pragma PAGEDCODE
				
				NTSTATUS DispatchControl(PDEVICE_OBJECT fdo, PIRP Irp)
					{							// DispatchControl
					PAGED_CODE();
					PDEVICE_EXTENSION pdx = (PDEVICE_EXTENSION) fdo->DeviceExtension;
				
					NTSTATUS status = IoAcquireRemoveLock(&pdx->RemoveLock, Irp);
					if (!NT_SUCCESS(status))
						return CompleteRequest(Irp, status, 0);
					ULONG info = 0;
				
					PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(Irp);
					ULONG cbin = stack->Parameters.DeviceIoControl.InputBufferLength;
					ULONG cbout = stack->Parameters.DeviceIoControl.OutputBufferLength;
					ULONG code = stack->Parameters.DeviceIoControl.IoControlCode;
				
					switch (code)
						{						// process request
				
					case IOCTL_GENERATE_EVENT:				// code == 0x800
						{						// IOCTL_GENERATE_EVENT
				
						RANDOM_NOTIFICATION notify;
						notify.Version = 1;
						notify.Size = sizeof(notify);
						notify.Event = GUID_PNPEVENT_EVENT;
						notify.FileObject = NULL;
						notify.NameBufferOffset = FIELD_OFFSET(RANDOM_NOTIFICATION, text)
							- FIELD_OFFSET(RANDOM_NOTIFICATION, CustomDataBuffer);
						*(PULONG)(notify.CustomDataBuffer) = 42;
						wcscpy(notify.text, L"Hello, world!");
				
				//		status = IoReportTargetDeviceChange(pdx->Pdo, ¬ify);
						status = IoReportTargetDeviceChangeAsynchronous(pdx->Pdo, ¬ify, NULL, NULL);
						if (NT_SUCCESS(status))
							status = STATUS_SUCCESS; // i.e., not STATUS_PENDING
						else
							KdPrint(("PNPEVENT - IoReportTargetDeviceChange failed - %X\n", status));
						break;
						}						// IOCTL_GENERATE_EVENT
				
					default:
						status = STATUS_INVALID_DEVICE_REQUEST;
						break;
				
						}						// process request
				
					IoReleaseRemoveLock(&pdx->RemoveLock, Irp);
					return CompleteRequest(Irp, status, info);
					}							// DispatchControl