关于deviceioconctrol和irp的几个问题！！

BOOL DeviceIoControl(
  HANDLE hDevice,              // handle to device
  DWORD dwIoControlCode,       // operation
  LPVOID lpInBuffer,           // input data buffer
  DWORD nInBufferSize,         // size of input data buffer
  LPVOID lpOutBuffer,          // output data buffer
  DWORD nOutBufferSize,        // size of output data buffer
  LPDWORD lpBytesReturned,     // byte count
  LPOVERLAPPED lpOverlapped    // overlapped information
);

LPVOID lpInBuffer, LPVOID lpOutBuffer,nInBufferSize,nOutBufferSize, 和IRP中的AssociatedIrp.SystemBuffer,MdlAddress,UserBuffer，还有DeviceIoControl结构中的Type3InputBuffer,OutputBufferLength,InputBufferlength       有什么样的对应关系？？？？？？？？
没有头绪了，希望哪个大侠能详细的给讲课，给我点时间，多谢了！！！！！        

那是不是DWORD dwIoControlCode对应于IoGetCurrentIrpStackLocation(Irp)->parameters.DeviceIoControl.IoControlCode?
不知我得理解对否？

BOOL DeviceIoControl(
  HANDLE hDevice,              // handle to device
  DWORD dwIoControlCode,       // operation
  LPVOID lpInBuffer,           // input data buffer
  DWORD nInBufferSize,         // size of input data buffer
  LPVOID lpOutBuffer,          // output data buffer
  DWORD nOutBufferSize,        // size of output data buffer
  LPDWORD lpBytesReturned,     // byte count
  LPOVERLAPPED lpOverlapped    // overlapped information
);

LPVOID lpInBuffer, LPVOID lpOutBuffer,nInBufferSize,nOutBufferSize, 和IRP中的AssociatedIrp.SystemBuffer,MdlAddress,UserBuffer，还有DeviceIoControl结构中的Type3InputBuffer,OutputBufferLength,InputBufferlength       有什么样的对应关系？？？？？？？？
没有头绪了，希望哪个大侠能详细的给讲课，给我点时间，多谢了！！！！！        
 

在BUFFERED方式下，lpInBuffer和AssociatedIrp.SystemBuffer对应，在DIRECT方式下，和MdlAddress对应

BOOL DeviceIoControl(
  HANDLE hDevice,              // handle to device
  DWORD dwIoControlCode,       // operation
  LPVOID lpInBuffer,           // input data buffer
  DWORD nInBufferSize,         // size of input data buffer
  LPVOID lpOutBuffer,          // output data buffer
  DWORD nOutBufferSize,        // size of output data buffer
  LPDWORD lpBytesReturned,     // byte count
  LPOVERLAPPED lpOverlapped    // overlapped information
);

LPVOID lpInBuffer, LPVOID lpOutBuffer,nInBufferSize,nOutBufferSize, 和IRP中的AssociatedIrp.SystemBuffer,MdlAddress,UserBuffer，还有DeviceIoControl结构中Type3InputBuffer,OutputBufferLength,InputBufferlength       有什么样的对应关系？？？？？？？？
没有头绪了，希望哪个大侠能详细的给讲课，给我点时间，多谢了！！！！！        
 

这是个Win32函数，主要是实现ring3和ring0的通讯的，按你的顺序：输入数据的地址，大小，接下来的俩个设为NULL和0(在应用程序中调用时）。具体的你可以参考NTDDK帮助，那里解析的很清楚。
给分不？加分！

nInBufferSize  <--->  InputBufferlength
nOutBufferSize <--->  OutputBufferLength

我也来听