盘符

查找所有的盘符，并且只显示可移动磁盘，也就是U盘

/** * find all drivers and show removeable drivers */
void CUkeyKitDlg::FindAllDrivers()
{
        CComboBox* Driver=(CComboBox*)GetDlgItem(IDC_COMBO1);
        Driver->ResetContent();
        DWORD dwNumBytesForDriveStrings;//实际存储驱动器号的字符串长度
        HANDLE hHeap;
        LPSTR lp;
        CString strLogdrive;

       //获得实际存储驱动器号的字符串长度
        dwNumBytesForDriveStrings=GetLogicalDriveStrings(0,NULL)*sizeof(TCHAR);

       //如果字符串不为空，则表示有正常的驱动器存在
        if (dwNumBytesForDriveStrings!=0) {
        //分配字符串空间
        hHeap=GetProcessHeap();
        lp=(LPSTR)HeapAlloc(hHeap,HEAP_ZERO_MEMORY,dwNumBytesForDriveStrings);

       //获得标明所有驱动器的字符串
        GetLogicalDriveStrings(HeapSize(hHeap,0,lp),lp);

        //将驱动器一个个放到下拉框中 
        char s[40];
        while (*lp!=0) {
            UINT nDriveType = GetDriveType(lp);
            if (nDriveType == DRIVE_REMOVABLE){
               sprintf(s, "%s (%c:) %d MB", "可移动驱动器", lp[0],getTotalSpace(lp) );
               //驱动器是这样的 c:\ d:\ 所以只取第一个字符
               Driver->AddString(s);
            }
            lp=_tcschr(lp,0)+1;
        }
    }

}

磁盘号

通过盘符，获取磁盘号

/****************************************************************************** * Function: get disk's physical number from its drive letter * e.g. C-->0 (C: is on disk0) * input: letter, drive letter * output: N/A * return: Succeed, disk number * Fail, -1 ******************************************************************************/
DWORD CUkeyKitDlg::GetPhysicalDriveFromPartitionLetter(CHAR letter)
{
    HANDLE hDevice;               // handle to the drive to be examined
    BOOL result;                 // results flag
    DWORD readed;                   // discard results
    STORAGE_DEVICE_NUMBER number;   //use this to get disk numbers

    CHAR path[DISK_PATH_LEN];
    sprintf(path, "\\\\.\\%c:", letter);
    hDevice = CreateFile(path, // drive to open
                         GENERIC_READ | GENERIC_WRITE,    // access to the drive
                         FILE_SHARE_READ | FILE_SHARE_WRITE,    //share mode
                         NULL,             // default security attributes
                         OPEN_EXISTING,    // disposition
                         0,                // file attributes
                         NULL);            // do not copy file attribute
    if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
    {
        fprintf(stderr, "CreateFile() Error: %ld\n", GetLastError());
        return DWORD(-1);
    }

    result = DeviceIoControl(
                hDevice,                // handle to device
                IOCTL_STORAGE_GET_DEVICE_NUMBER, // dwIoControlCode
                NULL,                            // lpInBuffer
                0,                               // nInBufferSize
                &number,           // output buffer
                sizeof(number),         // size of output buffer
                &readed,       // number of bytes returned
                NULL      // OVERLAPPED structure
            );
    if (!result) // fail
    {
        fprintf(stderr, "IOCTL_STORAGE_GET_DEVICE_NUMBER Error: %ld\n", GetLastError());
        (void)CloseHandle(hDevice);
        return (DWORD)-1;
    }
    //printf("%d %d %d\n\n", number.DeviceType, number.DeviceNumber, number.PartitionNumber);

    (void)CloseHandle(hDevice);
    return number.DeviceNumber;
}
/* * get totol space of disk * return : MB */
int CUkeyKitDlg::getTotalSpace(const char* lpRootPathName)
{
    unsigned long long available,total,free;
    if(GetDiskFreeSpaceEx(lpRootPathName,(ULARGE_INTEGER*)&available,(ULARGE_INTEGER*)&total,(ULARGE_INTEGER*)&free)){
      return total>>20;
    }else{
       return -1;
    }
}

自己写的grubist.exe 的界面

由于使用的是1.1版本，所以属于一次开发，使用的可以去这里下载想
http://download.csdn.net/detail/li740207611/9595323