DeviceIoControl函数的问题

我写了一驱动程序,应用程序调用DeviceIoControl函数接受数据却只能得到4个字节(我是想得到5个字节).请各位指点,谢谢!
应用程序代码:
    ......
    typedef struct OutParaStruct{
       UCHAR Flag;
       UCHAR PciConfig[64];
       }OutParaStruct,*POutParaStruct;
    OutParaStruct RetInforma;
    RetInforma.Flag=0;
    for(int i=0;i<65;i++)
  RetInforma.PciConfig[i]=0;
    DWORD  OutBuffer;
  
  DWORD Returned;
  HANDLE   hDevice;
  hDevice = CreateFile( "\\\\.\\MyDevice",
                          GENERIC_READ | GENERIC_WRITE,
                          0,
                          NULL,
                          OPEN_EXISTING,
                          FILE_ATTRIBUTE_NORMAL,
                          NULL
                          );
  bool ret;
  long ConfigPara;
    for(long BusNumber=0;BusNumber<4;BusNumber++)
  for(long DevNumber=0;DevNumber<32;DevNumber++)
  for(long FuncNumber=0;FuncNumber<8;FuncNumber++)
  {
  C|(BusNumber<<16)|(DevNumber<<11)|(FuncNumber<<8)|(0x0<<2);
      bool ret=DeviceIoControl(hDevice,IOCTL_GET_VALUE,(LPVOID)&ConfigPara,(DWORD)65,(LPVOID)&RetInforma,(DWORD)65,&Returned,NULL);
      if((int)(BYTE)RetInforma.Flag==true)
  {
  }
  }
驱动程序代码:
   UCHAR OutParaBuffer[65];
   NTSTATUS TestWDMIoControl(IN PDEVICE_OBJECT fdo,IN PIRP irp)
{
    PIO_STACK_LOCATION IrpStack=IoGetCurrentIrpStackLocation(irp);
    ULONG C />     
   
    for(int i=0;i<65;i++)
        OutParaBuffer[i]=0x0;
    PVOID inputBuffer, outputBuffer;
    ULONG inputBufferLength, outputBufferLength;
    ULONG ioControlCode;
   //get Buffer's Positon & length.
    inputBuffer = irp->AssociatedIrp.SystemBuffer;
    inputBufferLength = IrpStack->Parameters.DeviceIoControl.InputBufferLength;
    outputBuffer = irp->AssociatedIrp.SystemBuffer;
    outputBufferLength = IrpStack->Parameters.DeviceIoControl.OutputBufferLength;
    
    ULONG ConfigData;
    ULONG VenDevID;
    USHORT VendorID,DeviceID;
    ULONG ConfigAddrPortAddress;
    ULONG ConfigDataPortAddress;
    
    switch(ControlCode)
    {
     case IOCTL_GET_VALUE:      
        __asm{
        pusha
        mov eax,[ebp+0xc]
        mov ebx,[eax+0xc]
        mov eax,[ebx]
        mov ConfigData,eax
        mov eax,ConfigData
        mov dx,0xcf8
        out dx,eax
        mov dx,0xcfc
        in eax,dx
        cmp ax,0xffff
        jz lable1
        mov VenDevID,eax
        mov  VendorID,ax
        shr eax,16
        mov  DeviceID,ax
lable1: popa
        }
        if((VendorID)!=0xffff)
        {
         OutParaBuffer[0]=0x1;
         OutParaBuffer[1]=(UCHAR)VenDevID;
         OutParaBuffer[2]=(UCHAR)(VenDevID>>8);
         OutParaBuffer[3]=(UCHAR)(VenDevID>>16);
         OutParaBuffer[4]=(UCHAR)(VenDevID>>24);
            __asm{
         pusha
        
            popa
                }
                
                
                RtlCopyMemory(irp->AssociatedIrp.SystemBuffer,OutParaBuffer,outputBufferLength);
        }
        
       
       
        
        break;
    
      default:
     break;