ffi_ex.py

from cffi import FFI

ffi = FFI()
ffi.cdef('''
    HANDLE FindFirstVolume(LPTSTR lpszVolumeName, DWORD cchBufferLength);
    BOOL FindVolumeClose(HANDLE hFindVolume);
    ''')

lib = ffi.verify('''
    /* Note - need UNICODE here as ffi won't auto-detect if we need it */
    #define UNICODE
    #include <windows.h>
''', libraries=["kernel32"])

LEN = 10000
buf = ffi.new("TCHAR[]", LEN)
h = FindFirstVolume(buf, LEN)
print(ffi.string(buf))
FindVolumeClose(h)