C++獲取設備 PID，VID 信息

可直接編譯（設置成：使用多字節字符集）

轉來的，代碼：

/*
http://www.experts-exchange.com/Programming/Editors_IDEs/Q_24506125.html
*/

#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <winioctl.h>
#include <regstr.h>
#include <tchar.h>
#include <string>
using namespace std;

#pragma comment(lib,"setupapi.lib")

/*
獲取設備數
	路徑: 如G:
	設備數
*/
BOOL GetDeviceNumber(LPCTSTR pszDevPath, DWORD& dwDevNum) {

	BOOL bRC = FALSE;

	HANDLE hDrive = CreateFile(
		pszDevPath,
		0,
		FILE_SHARE_READ | FILE_SHARE_WRITE,
		NULL,
		OPEN_EXISTING, 
		NULL, 
		NULL
		);

	if (INVALID_HANDLE_VALUE != hDrive) {

		STORAGE_DEVICE_NUMBER sdn;
		DWORD dwBytesReturned = 0;

		bRC = DeviceIoControl(
			hDrive,
			IOCTL_STORAGE_GET_DEVICE_NUMBER,
			NULL, 
			0, 
			&sdn, 
			sizeof(sdn),
			&dwBytesReturned, 
			NULL
			);


		if (bRC) dwDevNum = sdn.DeviceNumber;

		CloseHandle(hDrive);
	}else printf("Error:[%d] (%s)\n",GetLastError(),pszDevPath);

	return bRC;    
}


int GetDeviceDescription(LPCTSTR pszDrive, TCHAR* pszDesc, const size_t szDescSize)
{
	TCHAR acDevName[MAX_PATH];
	//  QueryDosDevice(pszDrive,acDevName,MAX_PATH);
	//  printf("Test: %s\n",acDevName);
	_stprintf(acDevName,"\\\\.\\%s", pszDrive);
	DWORD dwNumOfInterest = -1;;
	GetDeviceNumber(acDevName,dwNumOfInterest);
	//printf("DeviceNumber:[%d]\n",dwNumOfInterest);
	GUID* guid = (GUID*)&GUID_DEVINTERFACE_DISK;
	// Get device interface info set handle
	// for all devices attached to system
	HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL,
		DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
	if (hDevInfo == INVALID_HANDLE_VALUE)  {
		return 0;
	}

	// Retrieve a context structure for a device interface
	// of a device information set.
	DWORD dwIndex = 0;
	BOOL bRet = FALSE;

	BYTE Buf[1024];
	PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd =
		(PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;
	SP_DEVICE_INTERFACE_DATA         spdid;
	SP_DEVINFO_DATA                  spdd;
	DWORD                            dwSize;
	spdid.cbSize = sizeof(spdid);
	while ( true )  {
		bRet = SetupDiEnumDeviceInterfaces(hDevInfo, NULL,
			guid, dwIndex, &spdid);

		if (!bRet) {
			break;
		}

		dwSize = 0;
		SetupDiGetDeviceInterfaceDetail(hDevInfo,
			&spdid, NULL, 0, &dwSize, NULL);

		if ( dwSize!=0 && dwSize<=sizeof(Buf) ) {
			pspdidd->cbSize = sizeof(*pspdidd); // 5 Bytes!


			ZeroMemory((PVOID)&spdd, sizeof(spdd));
			spdd.cbSize = sizeof(spdd);

			long res =
				SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, pspdidd,
				dwSize, &dwSize,
				&spdd);

			printf("Result:[%s]\n",pspdidd->DevicePath); // <--------- here!

			DWORD dwType;
			LPTSTR buffer = NULL;
			DWORD buffersize = 0;

			while (!SetupDiGetDeviceRegistryProperty(
				hDevInfo,
				&spdd,
				SPDRP_FRIENDLYNAME,
				&dwType,
				(PBYTE)buffer,
				buffersize,
				&buffersize))
			{
				if (GetLastError() == 
					ERROR_INSUFFICIENT_BUFFER)
				{
					// Change the buffer size.
					if (buffer) LocalFree(buffer);
					// Double the size to avoid problems on 
					// W2k MBCS systems per KB 888609. 
					buffer =(LPTSTR) LocalAlloc(LPTR,buffersize * 2);
				}
				else
				{
					// Insert error handling here.
					break;
				}
			}

			DWORD dwNum = 0;;
			GetDeviceNumber(pspdidd->DevicePath,dwNum);
			//printf("DeviceNumber:[%d]\n",dwNum);

			//if (dwNumOfInterest == dwNum) _stprintf(pszDesc,_T("%s"),buffer);
			if (dwNumOfInterest == dwNum) _stprintf(pszDesc,_T("%s"),pspdidd->DevicePath);

			//printf("Result:[%s]\n",buffer);     
			if (buffer) LocalFree(buffer); 

		}
		dwIndex++;
	}
	SetupDiDestroyDeviceInfoList(hDevInfo);
	return 0;
}

void main (int argc, char** argv) {
	TCHAR acDesc[1024] = "<unknown>";
	TCHAR* pszDrive;
	if (2 != argc) {

		printf("Usage: usbdev.exe <drive letter> (ex.: 'usbdev f:')\n");
	}
	pszDrive = *(argv + 1);
	GetDeviceDescription(pszDrive, acDesc, 1024);
	_tprintf("\nDescription for %s\n\n\t%s\n", pszDrive, acDesc);
	system("pause");
}