Sending data continuously when pushbutton is being pressed

I am working on a GUI in matlab. I want it to behave it such that when pushbutton is pressed,data behind it transmits continuously till the right click of mouse is released.Below code is in the callback of a pushbutton.

    % --- Executes on button press in pushbutton4.
function pushbutton4_Callback(~, ~, ~)
% hObject    handle to pushbutton4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)x
 global obj1;
 fprintf(obj1,'A');

How should i do it. Also, what'll be the difference if I put above code in the other callback functions of same pushbutton.

Answer 1

[Image Analyst]

I'm not sure a pushbutton can operate like that. But if it can, you'd have to define the ButtonDownFcn function for it. Look in the property inspector and click on the little button. When I tried it, it didn't work though.

[Ahmer Ahmed]

Thanks for feedback. I have tried using Buttondownfcn but to no avail.