I want to pass data between two windows of GUI

I want to pass data from the first window to the secod window. I am not sure how to do it since I am new to this app designer.

I already try few steps from the youtube, but the second window did not progress the output that I want.

Mainapp code:

properties (Access = private)
DialogApp % Description
end
% Callbacks that handle component events
methods (Access = private)

% Button pushed function: CALCULATEButton
function CALCULATEButtonPushed(app, event)
app.DialogApp = dialogapp(app);
delete(app)
end
% Value changed function: FORCEFNEditField
function FORCEFNEditFieldValueChanged(app, event)
value = app.FORCEFNEditField.Value; 
end

Dialogapp code:

properties (Access = private)
        CallingApp % Description
    end
    methods (Access = public)
        function importdata(app)
        app.FORCEFNEditField=force;
        app.AREAAm2EditField=area;
        stress = force/area;
        app.STRESSFANm2EditField.Value= stress;   
        end
    end
    % Callbacks that handle component events
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app, mainapp)
            app.CallingApp = mainapp;
        end
    end

I not sure which part I was wrong. Hope u guys can help me.

Answer 1

[Image Analyst]

First see the FAQ:

https://matlab.fandom.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI(s)?

[Wan Muzamir]

Thanks

Answer 2

[Walter Roberson]

Something closer to

Mainapp:

properties (Access = public)
force
area
end
% Callbacks that handle component events
methods (Access = private)
% Button pushed function: CALCULATEButton
function CALCULATEButtonPushed(app, event)
dialogapp(app);
delete(app)
end
% Value changed function: FORCEFNEditField
function FORCEFNEditFieldValueChanged(app, event)
app.force = app.FORCEFNEditField.Value; 
end
function AREAAM2EditFieldValueChanged(app, event)
app.area = app.AREAAM2EditField.Value; 
end

Dialogapp:

    methods (Access = public)
        % Code that executes after component creation
        function dialogapp(mainapp)
            app.stressFANM2TextField.Value = mainapp.force / mainapp.area;
        end
    end

[Wan Muzamir]

Which callbacks I need to use for the dialog app, is it startup or I just need to create public function?

Thank you