根据GUID获取设备信息

#include <windows.h>
#include <setupapi.h>
#include <objbase.h>
#include <initguid.h>
#include <stdio.h>

DEFINE_GUID(GUID_DEVINTERFACE_CDROM, 0x53f56308L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
#define CdRomClassGuid GUID_DEVINTERFACE_CDROM

//DEFINE_GUID(DiskClassGuid,               0x53f56307L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(CdRomClassGuid,              0x53f56308L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(PartitionClassGuid,          0x53f5630aL, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(TapeClassGuid,               0x53f5630bL, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(WriteOnceDiskClassGuid,      0x53f5630cL, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(VolumeClassGuid,             0x53f5630dL, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(MediumChangerClassGuid,      0x53f56310L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(FloppyClassGuid,             0x53f56311L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(CdChangerClassGuid,          0x53f56312L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
//DEFINE_GUID(StoragePortClassGuid,        0x2accfe60L, 0xc130, 0x11d2, 0xb0, 0x82, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);     

#define INTERFACE_DETAIL_SIZE   (1024)
#define MAX_DEVICE      (16)
int GetDevicePath(LPGUID lpGuid, LPTSTR* pszDevicePath)
{
    HDEVINFO hDevInfoSet;
    SP_DEVICE_INTERFACE_DATA ifdata;
    PSP_DEVICE_INTERFACE_DETAIL_DATA pDetail;
    int nCount;
    BOOL bResult;     

    // 取得一个该GUID相关的设备信息集句柄
    hDevInfoSet = SetupDiGetClassDevs(lpGuid,     // class GUID
        NULL,                                   // 无关键字
        NULL,                                   // 不指定父窗口句柄
        DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); // 目前存在的设备     

    // 失败...
    if(hDevInfoSet == INVALID_HANDLE_VALUE)
    {
        return ;
    }     

    // 申请设备接口数据空间
    pDetail = (PSP_DEVICE_INTERFACE_DETAIL_DATA)GlobalAlloc(LMEM_ZEROINIT, INTERFACE_DETAIL_SIZE);     

    pDetail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);     

    nCount = ;
    bResult = TRUE;     

    // 设备序号=0,1,2... 逐一测试设备接口，到失败为止
    while (bResult)
    {
        ifdata.cbSize=sizeof(ifdata);     

        // 枚举符合该GUID的设备接口
        bResult = SetupDiEnumDeviceInterfaces(
            hDevInfoSet,            // 设备信息集句柄
            NULL,                   // 不需额外的设备描述
            lpGuid,                 // GUID
            (ULONG)nCount,          // 设备信息集里的设备序号
            &ifdata);               // 设备接口信息     

        if(bResult)
        {
            // 取得该设备接口的细节(设备路径)
            bResult = SetupDiGetInterfaceDeviceDetail(
                hDevInfoSet,            // 设备信息集句柄
                &ifdata,                // 设备接口信息
                pDetail,                // 设备接口细节(设备路径)
                INTERFACE_DETAIL_SIZE,  // 输出缓冲区大小
                NULL,                   // 不需计算输出缓冲区大小(直接用设定值)
                NULL);                  // 不需额外的设备描述     

            if(bResult)
            {
                // 复制设备路径到输出缓冲区
                strcpy(pszDevicePath[nCount], pDetail->DevicePath);
                // 调整计数值
                nCount++;
            }
        }
    }     

    // 释放设备接口数据空间
    GlobalFree(pDetail);     

    // 关闭设备信息集句柄
    SetupDiDestroyDeviceInfoList(hDevInfoSet);     

    return nCount;
}  

int main(int argc, char **argv)
{
    char *path[] = {NULL};
    int i, count;
    GUID cdrom = CdRomClassGuid;

    for (i=; i<; i++)
    {
        path[i] = (char*)malloc();
    }
    count = GetDevicePath(&cdrom, path);
    for (i=; i<count; i++)
    {
        printf("%s/n", path[i]);
    }
    printf("HDD Count: %d/n", count);
    return TRUE;
}