cdef extern from "Windows.h":
    
    ctypedef unsigned LPCTSTR 
    ctypedef unsigned LPTSTR 
    ctypedef unsigned DWORD 
    ctypedef unsigned LPDWORD 
    ctypedef unsigned BOOL
    cdef LPCTSTR lpRootPathName
    cdef LPTSTR lpVolumeNameBuffer
    cdef DWORD nVolumeNameSize
    cdef LPDWORD lpVolumeSerialNumber
    cdef LPDWORD lpMaximumComponentLength
    cdef LPDWORD lpFileSystemFlags
    cdef LPTSTR lpFileSystemNameBuffer
    cdef DWORD nFileSystemNameSize
    
    
    cdef extern BOOL GetVolumeInformation(
                            lpRootPathName,
                            lpVolumeNameBuffer,
                            nVolumeNameSize,
                            lpVolumeSerialNumber,
                            lpMaximumComponentLength,
                            lpFileSystemFlags,
                            lpFileSystemNameBuffer,
                            nFileSystemNameSize
                            )
    
def get_volume_info(met):
    
    cdef LPTSTR VolumeNameBuffer
    cdef LPDWORD VolumeSerialNumber
    cdef LPDWORD MaximumComponentLength
    cdef LPDWORD FileSystemFlags
    cdef LPTSTR FileSystemNameBuffer

    
    ret = GetVolumeInformation('C:\\', VolumeNameBuffer, 1024, VolumeSerialNumber, MaximumComponentLength,FileSystemFlags, FileSystemNameBuffer, 1024)
    if ret:
        
        print VolumeSerialNumber
    else: print 'Error'