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MATLAB COM Support Limitations
Microsoft® does not support loading 32-bit DLLs or in-process COM servers into a 64-bit application, or conversely. So you cannot use 32-bit DLL COM objects in 64-bit MATLAB®.
Limitations of MATLAB COM support are:
MATLAB does not support custom COM interfaces with 64-bit MATLAB.
MATLAB only supports indexed collections.
COM controls are not printed with figure windows.
MATLAB does not support asynchronous events.