驱动编程为什么这个代码不正确，不生成sys。请求修改
#include "ntifs.h"//必须最前面，必须在ntddk前面
#include "ntddk.h"

NTSTATUS ReadWriteProcess()
{
    NTSTATUS Status;
    HANDLE hProcess;
    CLIENT_ID ClientId;
    OBJECT_ATTRIBUTES ObjAttr;
    PVOID AllocateAddress;
    size_t RegionSize;
    ClientId.UniqueProcess  =0;
    ClientId.UniqueThread=0;
   
    memset(&ObjAttr,0,sizeof(OBJECT_ATTRIBUTES));

   
    Status=ZwOpenProcess(&hProcess,PROCESS_ALL_ACCESS,&ObjAttr,&ClientId);
    if (!NT_SUCCESS(Status))
    {
        KdPrint(("error code:%X",Status));
        return Status;
    }
    RegionSize=0xff;
    Status=ZwAllocateVirtualMemory(hProcess,&AllocateAddress,0,(PSIZE_T)&RegionSize,MEM_COMMIT,PAGE_EXECUTE_READWRITE);
    KdPrint(("open sucessed!"));
    ZwClose(hProcess);
    return Status;
}

VOID MyUnload(PDRIVER_OBJECT pDriverObject)
{
}

NTSTATUS DriverEntry(PDRIVER_OBJECT pDriverObject,PUNICODE_STRING Reg_Path)
{
    ReadWriteProcess();
    pDriverObject->DriverUnload=MyUnload;
    return STATUS_SUCCESS;
   
}

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