windows驱动开发-HelloWorld驱动

#include <ntddk.h>
extern "C" VOID DriverUnload(IN PDRIVER_OBJECT pDriverObject);
extern "C" NTSTATUS DispatchRoutine(PDEVICE_OBJECT pDevObj, PIRP pIrp);

extern "C" NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject, PUNICODE_STRING pRegistryPath)//驱动入口
{
	DbgPrint("DriverEntry\r\n");

	pDriverObject->DriverUnload = DriverUnload;//注册卸载函数
	pDriverObject->MajorFunction[IRP_MJ_CREATE] = DispatchRoutine;//注册派遣函数
	pDriverObject->MajorFunction[IRP_MJ_CLOSE] = DispatchRoutine;
	pDriverObject->MajorFunction[IRP_MJ_WRITE] = DispatchRoutine;
	pDriverObject->MajorFunction[IRP_MJ_READ] = DispatchRoutine;

	return STATUS_SUCCESS;
}

extern "C" VOID DriverUnload(PDRIVER_OBJECT pDriverObject)
{
	DbgPrint("DriverUnload\r\n");
}

extern "C" NTSTATUS DispatchRoutine(PDEVICE_OBJECT pDevObj, PIRP pIrp)
{
	NTSTATUS status = STATUS_SUCCESS;
	pIrp->IoStatus.Status = status;
	pIrp->IoStatus.Information = 0;
	IoCompleteRequest(pIrp, IO_NO_INCREMENT);//完成IRP请求
	return status;
}