编写NT驱动时数据类型in
我在编写NT驱动时碰到这样一个函数void DemoUnload(IN PDRIVER_OBJECT DriverObject),我实在看不懂，in 是什么数据类型

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代表输入参数
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C/C++ code

//****************************************************************************//                           --- DemoUnload ---//// Purpose: This code is copied from NT DDK sample of generic driver. NT call//          this routine during driver unload//   Input: IN PDRIVER_OBJECT DriverObject - Pointer to the driver object//  Output: none//    Note: Typical CS aware driver will deregister client and detach from CS//          in this routine. This sample just deregister the client. Please//          refer to DoCardServices() function above for code which detach from//          CS//****************************************************************************