import cffi

wffi = cffi.FFI()
wffi.cdef(f'''
HANDLE GetCurrentProcess();
void *GetProcAddress(HMODULE hModule, LPCSTR lpProcName);
''')
wlib = wffi.dlopen('Kernel32.dll')

psffi = cffi.FFI()
psffi.cdef('BOOL EnumProcessModules(HANDLE hProcess, HMODULE *lphModule, DWORD cb, LPDWORD lpcbNeeded);')
pslib = psffi.dlopen('Psapi.dll')

def dlsym(sym):
    process = wlib.GetCurrentProcess()
    needed = wffi.new('LPDWORD')
    pslib.EnumProcessModules(process, wffi.NULL, 0, needed)
    buf = wffi.new('HANDLE[]', needed[0]//wffi.sizeof('HANDLE'))
    if pslib.EnumProcessModules(process, buf, wffi.sizeof(buf), needed):
        count = min(needed[0], wffi.sizeof(buf))//wffi.sizeof('HANDLE')
        mods = buf[0:count]
        for mod in mods:
            addr = wlib.GetProcAddress(mod, sym.encode('utf8'))
            if addr: return addr
    return wffi.NULL