ASM编写调用VxD。 以及VxD编写的科普 源代码

				#include 
				#include 
				#include 
				#include 
				#include "..\vxd\eventvxd.h"
				
				HANDLE hDevice;
				VMINFO *pVMInfo;
				
				DWORD WINAPI SecondThread( PVOID hEventRing3 );
				
				DWORD WINAPI SecondThread( PVOID hEventRing3 )
				{
				   while( TRUE )
				   {
				      WaitForSingleObject((HANDLE)hEventRing3, INFINITE );
				      printf("VM %08lx was %s\n", pVMInfo->hVM, 
				              pVMInfo->bVmCreated ? "created" : "destroyed" );
				   }
				   return 0;
				}
				
				void main( int ac, char *av[] )
				{
					HINSTANCE hKernel32Dll;
				   HANDLE    hEventRing3, hEventRing0;
				   DWORD     tid;
				   HANDLE    (WINAPI *pfOpenVxDHandle)(HANDLE);
				DWORD cbBytesReturned;
				
					const PCHAR VxDName = "\\\\.\\EVENTVXD.VXD";
				   
				   hEventRing3 = CreateEvent( 0, FALSE, FALSE, NULL );   
				   if (!hEventRing3)
				   {
				      printf("Cannot create Ring3 event\n");
				      exit(1);
				   }
				
				   hKernel32Dll = LoadLibrary("kernel32.dll");
				   if (!hKernel32Dll)
				   {
				   printf("Cannot load KERNEL32.DLL\n");
				   exit(1);
				   }
				
				   pfOpenVxDHandle = (HANDLE (WINAPI *) (HANDLE)) 
				                     GetProcAddress( hKernel32Dll, "OpenVxDHandle" ); 
				   if (!pfOpenVxDHandle)
				   {
				      printf("Cannot get addr of OpenVxDHandle\n");
				      exit(1);
				   }
				
				   hEventRing0 = (*pfOpenVxDHandle)(hEventRing3);
				   if (!hEventRing0)
				   {
				      printf("Cannot create Ring0 event\n");
				     exit(1);
				   }
				   
				   hDevice = CreateFile( VxDName, 0, 0, 0, 
				                         CREATE_NEW, FILE_FLAG_DELETE_ON_CLOSE, 0 );
				   if (!hDevice)
				   {
				      printf("Cannot load VxD error=%x\n", GetLastError() );
				      exit(1);
				   }
				
				   if (!DeviceIoControl( hDevice, EVENTVXD_REGISTER, 
				                         hEventRing0, sizeof(hEventRing0), 
				                         &pVMInfo, sizeof(pVMInfo), 
				                         &cbBytesReturned, 0 ))
				   {
				      printf("DeviceIoControl failed, error=%x\n", GetLastError() );
				      exit(1);
				   }
				   CreateThread( 0, 0x1000, SecondThread, hEventRing3, 0, &tid );
				   printf("Press any key to exit...");
				   getch();
				   CloseHandle( hDevice );
				}