Vxd中OnW32DeviceIoControl()在WDM应该用什么函数对应？

Vxd中OnW32DeviceIoControl()在WDM应该用什么函数对应？OnW32DeviceIoControl()参数中与应用程序通信的buffer，我在WDM怎样获得？请各位大虾帮忙！先谢了！  

At your DriverEntry, you set the  
DriverObject -> MajorFunction[IRP_MJ_DEVICE_CONTROL] = XXXDeviceControl;
the XXXDeviceControl is the place you want.,Check the samples in DDK, quite easy