学习了2个月时间 走了不少弯路 现奉上搜集到的驱动开发入门笔记 共勉！

				// Control.cpp -- IOCTL handlers for feature driver
				// Copyright (C) 1999 by Walter Oney
				// All rights reserved
				
				#include "stddcls.h"
				#include "driver.h"
				#include "ioctls.h"
				
				///////////////////////////////////////////////////////////////////////////////
				
				#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_FEATURE_CLEAR:				// code == 0x800
						{						// IOCTL_FEATURE_CLEAR
						URB urb;
						UsbBuildFeatureRequest(&urb, URB_FUNCTION_CLEAR_FEATURE_TO_INTERFACE, FEATURE_LED_DISPLAY, 1, NULL);
						status = SendAwaitUrb(fdo, &urb);
						if (!NT_SUCCESS(status))
							KdPrint((DRIVERNAME " - Clear feature failed with status %X\n", status));
						break;
						}						// IOCTL_FEATURE_CLEAR
				
					case IOCTL_FEATURE_SET:				// code == 0x801
						{						// IOCTL_FEATURE_SET
						URB urb;
						UsbBuildFeatureRequest(&urb, URB_FUNCTION_SET_FEATURE_TO_INTERFACE, FEATURE_LED_DISPLAY, 1, NULL);
						status = SendAwaitUrb(fdo, &urb);
						if (!NT_SUCCESS(status))
							KdPrint((DRIVERNAME " - Set feature failed with status %X\n", status));
						break;
						}						// IOCTL_FEATURE_SET
				
					case IOCTL_GET_STATUS:				// code == 0x802
						{						// IOCTL_GET_STATUS
						if (cbin < 2 || cbout < sizeof(USHORT))
							{
							status = STATUS_INVALID_PARAMETER;
							break;
							}
				
						PUCHAR data = (PUCHAR) Irp->AssociatedIrp.SystemBuffer;
						
						// Determine opcode based on first byte of data. If an interface or
						// endpoint is specified, its index is the second byte of data
				
						USHORT opcode;
						USHORT index;
				
						switch (data[0])
							{					// determine opcode
						case 0:
							opcode = URB_FUNCTION_GET_STATUS_FROM_DEVICE;
							index = 0;
							break;
				
						case 1:
							opcode = URB_FUNCTION_GET_STATUS_FROM_INTERFACE;
							index = data[1];
							break;
				
						case 2:
							opcode = URB_FUNCTION_GET_STATUS_FROM_ENDPOINT;
							index = data[1];
							break;
				
						default:
							opcode = URB_FUNCTION_GET_STATUS_FROM_OTHER;
							index = data[1];
							break;
							}					// determine opcode
				
						// Create and submit URB to obtain 2-byte status
				
						URB urb;
						UsbBuildGetStatusRequest(&urb, opcode, index, data, NULL, NULL);
						status = SendAwaitUrb(fdo, &urb);
						if (NT_SUCCESS(status))
							info = sizeof(USHORT);
						else
							KdPrint((DRIVERNAME " - Get status failed with status %X\n", status));
				
						break;
						}						// IOCTL_GET_STATUS
				
					case IOCTL_GET_CONFIGURATION:				// code == 0x803
						{						// IOCTL_GET_CONFIGURATION
						if (cbout < sizeof(UCHAR))
							{
							status = STATUS_INVALID_PARAMETER;
							break;
							}
						
						URB urb = {0};
						urb.UrbControlGetConfigurationRequest.Hdr.Length = sizeof(_URB_CONTROL_GET_CONFIGURATION_REQUEST);
						urb.UrbControlGetConfigurationRequest.Hdr.Function = URB_FUNCTION_GET_CONFIGURATION;
						urb.UrbControlGetConfigurationRequest.TransferBufferLength = sizeof(UCHAR);
						urb.UrbControlGetConfigurationRequest.TransferBuffer = Irp->AssociatedIrp.SystemBuffer;
				
						status = SendAwaitUrb(fdo, &urb);
						if (NT_SUCCESS(status))
							info = sizeof(UCHAR);
						else
							KdPrint((DRIVERNAME " - Get configuration failed with status %X\n", status));
				
						break;
						}						// IOCTL_GET_CONFIGURATION
				
					case IOCTL_GET_INTERFACE:				// code == 0x804
						{						// IOCTL_GET_INTERFACE
						if (cbin < sizeof(UCHAR) || cbout < sizeof(UCHAR))
							{
							status = STATUS_INVALID_PARAMETER;
							break;
							}
				
						URB urb = {0};
						urb.UrbControlGetInterfaceRequest.Hdr.Length = sizeof(_URB_CONTROL_GET_INTERFACE_REQUEST);
						urb.UrbControlGetInterfaceRequest.Hdr.Function = URB_FUNCTION_GET_INTERFACE;
						urb.UrbControlGetInterfaceRequest.TransferBufferLength = sizeof(UCHAR);
						urb.UrbControlGetInterfaceRequest.TransferBuffer = Irp->AssociatedIrp.SystemBuffer;
						urb.UrbControlGetInterfaceRequest.Interface = *(PUCHAR) Irp->AssociatedIrp.SystemBuffer;
				
						status = SendAwaitUrb(fdo, &urb);
						if (NT_SUCCESS(status))
							info = sizeof(UCHAR);
						else
							KdPrint((DRIVERNAME " - Get interface failed with status %X\n", status));
				
						break;
						}						// IOCTL_GET_INTERFACE
				
					default:
						status = STATUS_INVALID_DEVICE_REQUEST;
						break;
				
						}						// process request
				
					IoReleaseRemoveLock(&pdx->RemoveLock, Irp);
					return CompleteRequest(Irp, status, info);
					}							// DispatchControl