获取电脑的唯一标识有很多好处，比如注册、授权等，而且电脑中有很多是唯一标识的硬件，比如网卡、CPU、硬盘、主板等。但是如果电脑中有两个网卡的话，就不知道使用哪个网卡作为唯一的了。可以通过获取主板的ID，作为唯一的标识。

通常情况下，可以通过命令行来获取主板ID：

wmic csproduct get uuid

获取CPU的标识符：

wmic cpu get processorid

获取硬盘序列号：

wmic diskdrive get serialnumber

具体操作如下：

如何通过C++代码来获取BOIS的标识符呢？

#include <string>
#include <windows.h>

BOOL getBoisIDByCmd(char *lpszBaseBoard) {
	const long MAX_COMMAND_SIZE = 10000; // 命令行输出缓冲大小	

	WCHAR szFetCmd[] = L"wmic csproduct get UUID"; // 获取BOIS命令行	
	const string strEnSearch = "UUID"; // 主板序列号的前导信息

	BOOL   bret = FALSE;
	HANDLE hReadPipe = NULL; //读取管道
	HANDLE hWritePipe = NULL; //写入管道	
	PROCESS_INFORMATION pi; //进程信息	
	memset(&pi, 0, sizeof(pi));
	STARTUPINFO	si;	//控制命令行窗口信息
	memset(&si, 0, sizeof(si));
	SECURITY_ATTRIBUTES sa; //安全属性
	memset(&sa, 0, sizeof(sa));

	char szBuffer[MAX_COMMAND_SIZE + 1] = { 0 }; // 放置命令行结果的输出缓冲区
	string	strBuffer;
	unsigned long count = 0;
	long ipos = 0;

	pi.hProcess = NULL;
	pi.hThread = NULL;
	si.cb = sizeof(STARTUPINFO);
	sa.nLength = sizeof(SECURITY_ATTRIBUTES);
	sa.lpSecurityDescriptor = NULL;
	sa.bInheritHandle = TRUE;

	//1.创建管道
	bret = CreatePipe(&hReadPipe, &hWritePipe, &sa, 0);
	if (!bret) {
		CloseHandle(hWritePipe);
		CloseHandle(hReadPipe);
	
		return bret;
	}

	//2.设置命令行窗口的信息为指定的读写管道
	GetStartupInfo(&si);
	si.hStdError = hWritePipe;
	si.hStdOutput = hWritePipe;
	si.wShowWindow = SW_HIDE; //隐藏命令行窗口
	si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

	//3.创建获取命令行的进程
	bret = CreateProcess(NULL, szFetCmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
	if (!bret) {
		CloseHandle(hWritePipe);
		CloseHandle(hReadPipe);
		CloseHandle(pi.hProcess);
		CloseHandle(pi.hThread);

		return bret;
	}

	//4.读取返回的数据
	WaitForSingleObject(pi.hProcess, 200);
	bret = ReadFile(hReadPipe, szBuffer, MAX_COMMAND_SIZE, &count, 0);
	if (!bret) {
		CloseHandle(hWritePipe);
		CloseHandle(hReadPipe);
		CloseHandle(pi.hProcess);
		CloseHandle(pi.hThread);

		return bret;
	}

	//5.查找主板ID
	bret = FALSE;
	strBuffer = szBuffer;
	ipos = strBuffer.find(strEnSearch);

	if (ipos < 0){ // 没有找到
		CloseHandle(hWritePipe);
		CloseHandle(hReadPipe);
		CloseHandle(pi.hProcess);
		CloseHandle(pi.hThread);

		return bret;
	} else {
		strBuffer = strBuffer.substr(ipos + strEnSearch.length());
	}

	memset(szBuffer, 0x00, sizeof(szBuffer));
	strcpy_s(szBuffer, strBuffer.c_str());

	//去掉中间的空格 \r \n
	int j = 0;
	for (int i = 0; i < strlen(szBuffer); i++) {
		if (szBuffer[i] != ' ' && szBuffer[i] != '\n' && szBuffer[i] != '\r') {
			lpszBaseBoard[j] = szBuffer[i];
			j++;
		}
	}

	CloseHandle(hWritePipe);
	CloseHandle(hReadPipe);
	CloseHandle(pi.hProcess);
	CloseHandle(pi.hThread);

	return TRUE;
}