请看看帮我《Windows 2000 设备驱动程序设计指南》中的例子

书中第7章有一个内核模式驱动的例子，我已经把他编译好了，并且安装好了，在计算机管理里面可以看到了，下面的例子是来测试这个驱动程序的，可是运行是老是提示驱动文件不能打开，请问是怎么回事？
#include <windows.h>
#include <stdio.h>

int main() {
HANDLE hDevice;
BOOL status;

printf(\"Beginning test of Loopback Driver (CH7)...\\n\");

hDevice =
CreateFile(\"\\\\\\\\.\\\\LBK1\",
GENERIC_READ | GENERIC_WRITE,
0, // share mode none
NULL, // no security
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL ); // no template
if (hDevice == INVALID_HANDLE_VALUE) {
printf(\"Failed to obtain file handle to device: \"
\"%s with Win32 error code: %d\\n\",
\"LBK1\", GetLastError() );
return 1;
}

printf(\"Succeeded in obtaining handle to LBK1 device.\\n\");

printf(\"Attempting write to device...\\n\");
char outBuffer[] = \"This is a test of the Loopback device\";
DWORD outCount = sizeof(outBuffer);
DWORD bW;
status =
WriteFile(hDevice, outBuffer, outCount, &bW, NULL);
if (!status) {
printf(\"Failed on call to WriteFile - error: %d\\n\",
GetLastError() );
return 2;
}
if (outCount == bW) {
printf(\"Succeeded in writing %d bytes\\n\", outCount);
printf(\"Buffer was: %s\\n\", outBuffer);
} else {
printf(\"Failed to write the correct number of bytes.\\n\"
\"Attempted to write %d bytes, but WriteFile reported %d bytes.\\n\",
outCount, bW);
return 3;
}

printf(\"Attempting to read from device...\\n\");
char inBuffer[80];
DWORD inCount = sizeof(inBuffer);
DWORD bR;
status =
ReadFile(hDevice, inBuffer, inCount, &bR, NULL);
if (!status) {
printf(\"Failed on call to ReadFile - error: %d\\n\",
GetLastError() );
return 4;
}
if (bR == bW) {
printf(\"Succeeded in reading %d bytes\\n\", bR);
printf(\"Buffer was: %s\\n\", inBuffer);
} else {
printf(\"Failed to read the correct number of bytes.\\n\"
\"Should have read %d bytes, but ReadFile reported %d bytes.\\n\",
bW, inCount);
return 5;
}

printf(\"Attempting to close device LBK1...\\n\");
status =
CloseHandle(hDevice);
if (!status) {
printf(\"Failed on call to CloseHandle - error: %d\\n\",
GetLastError() );
return 6;
}
printf(\"Succeeded in closing device...exiting normally\\n\");
return 0;
}

驱动程序的名字为loopback.sys，我把CreateFile函数中的LBK1改为loopback也不管用，请问怎么回事？

看看你驱动中的创建的符号名是什么，然后再用这个符号名去打开它。

这个例子我用过，按照书上的步骤能接上至于你的原因，问题还不太明白请说明白点，
顺便问你一下，为何第九章开始的例子编译无法通过提示，“WDN。h\"
无法打开，但各种设置和前面例子一样,前面的却可以,为何