Octave C++ API - - Calling an m-file function of an object using its octave_value in c++

[Abhinav Tripathi]

Hi,
I am trying to see how to call a function of an object (octave class) in C API and get the result. I have tried to check the docs but couldn't find it.
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For example:
There is an octave class (either old style or classdef) named "baseclass" in m-file. There's an object "a" of that class. Now the m file passes it to c++ where it is represented by "octave_value". How to call a m-file function of baseclass in the c++ code to get the result?
I tried using subsref on the octave_value but it doesn't work!
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This is for trying something in pytave where if the octave class has a "_pyobject" function defined then it should be called in the c++ code.
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Regards,
Abhinav