ULONG slot = 0;

   trace("Get IUnknown pointer");
   CallCreateInstance("lcomp.dll");

   // -------------------------------------------------- //
   LUnknown* pIUnknown = CreateInstance(slot);
   if(pIUnknown == NULL) { trace("CallCreateInstance failed"); return 1; }
  //----------------------------------------------------//
   
   trace("Get IDaqLDevice interface");
   IDaqLDevice* pI;
   HRESULT hr = pIUnknown->QueryInterface(IID_ILDEV,(void**)&pI);
...

>>import ctypes
>>print type(ctypes.cdll.lcomp.CreateInstance(0))
<type 'int'>

>> from comtypes import *
>> p = POINTER(IUnknown)(cdll.lcomp.CreatInstance(0))

# Привязываю к интерфейсу
>> qI = p.QueryInterface(IUnknown)

# Вызываю функцию библионтеки
>> qI.OpenLDevice()
AttributeError

from ctypes import *

wl = cdll.wlcomp

hDll = pointer(c_ulong(wl.LoadAPIDLL('lcomp.dll')))
hErr = pointer(c_ulong())

print 'hDll', hDll

hIfc = pointer(c_ulong(wl.CallCreateInstance(hDll, 0, hErr)))

print 'hIfc', hIfc
print 'hErr', hErr
print wl.OpenLDevice(hIfc)


print 'Load Bios', wl.LoadBios(hIfc, 'L761')
print 'Plata Test', wl.PlataTest(hIfc)

class SlotParams(Structure):
    _fields_ = [('Base', c_ulong),
                  ('BaseL', c_ulong),
                  ('Base1', c_ulong),
                  ('BaseL1', c_ulong),
                  ('Mem', c_ulong),
                  ('MemL', c_ulong),
                  ('Mem1', c_ulong),
                  ('MemL1', c_ulong),
                  ('Irq', c_ulong),
                  ('BoardType', c_ulong),
                  ('DSPType', c_ulong),
                  ('Dma', c_ulong),
                  ('DmaDac', c_ulong),
                  ('DTA_REG', c_ulong),
                  ('IDMA_REG', c_ulong),
                  ('CMD_REG', c_ulong),
                  ('IRQ_RST', c_ulong),
                  ('DTA_ARRAY', c_ulong),
                  ('RDY_REG', c_ulong),
                  ('CFG_REG', c_ulong)]

"""
sl = pointer(SlotParams())
wl.GetSlotParam(hIfc, sl)

for field in sl.contents._fields_:
    value = getattr(sl.contents, field[0])

    print field[0], hex(int(value))
"""

print 'InitStartDevice', wl.InitStartLDevice(hIfc)
print 'StartDevice', wl.StartLDevice(hIfc)

L_ASYNC_ADC_INP = 6

class AsyncParam(Structure):
    _fields_ = [
                ('s_Type', c_ulong),
                ('FIFO', c_ulong),
                ('IrgStep', c_ulong),
                ('Pages', c_ulong),

                ('dRate', c_double),
                ('Rate', c_ulong),
                ('NCh', c_ulong),
                ('Chn', c_ulong * 128),
                ('Data', c_ulong * 128),
                ('Mode', c_ulong)]


for i in range(0, 10):
    pp = pointer(AsyncParam())
    pp.contents.s_Type = L_ASYNC_ADC_INP  

    pp.contents.Chn[0] = 1 

    print wl.IoAsync(hIfc, pp), pp.contents.Data[0]