Fixed #112

Author: vigoux

avaspec.py

@@ -222,7 +222,7 @@ def callback(self, handle, error):
 # please use AVS_Measure instead using Windows messaging or polling
 
 def AVS_MeasureCallback(handle, func, nummeas):
-    CBTYPE = ctypes.CFUNCTYPE(None, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
+    CBTYPE = ctypes.WINFUNCTYPE(None, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
     lib = ctypes.WinDLL("avaspecx64.dll")
     prototype = ctypes.WINFUNCTYPE(ctypes.c_int, ctypes.c_int, CBTYPE, ctypes.c_uint16)
     paramflags = (1, "handle",), (1, "adres",), (1, "nummeas"),