% Create CaoEngine object
cao = actxserver('CAO.CaoEngine');

% Get Workespaces object
ws = cao.Workspaces.Item(int32(0));

% Create Controller object
ctrl = ws.AddController('RC1', 'CaoProv.Dummy');

% Create Variable
I11 = ctrl.AddVariable('I11');

% Get Value
disp(I11.Value);

% Put Value
I11.Value = int32(123);
disp(I11.Value);