accessing data from handles structure from a call back fuction

 I am new in matlab GUI. The code I have written is as follows:

function pushbutton1_Callback(hObject, eventdata, handles)

% hObject handle to pushbutton1 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

%# JDBC connector path

    %javaaddpath('C:\DB\mysql-connector-java-5.1.17-bin.jar')

    %# connection parameteres

    host = 'localhost'; %MySQL hostname

    user = 'root'; %MySQL username

    password = '';%MySQL password

    dbName = 'signature'; %MySQL database name

    %# JDBC parameters

    jdbcString = sprintf('jdbc:mysql://%s/%s', host, dbName);

    jdbcDriver = 'com.mysql.jdbc.Driver';

 conn = database(dbName, user , password, jdbcDriver, jdbcString); 

 if isconnection(conn)
    list=get(handles.popupmenu1,'String');
val=get(handles.popupmenu1,'Value');
m=list{val};

    qry2 = sprintf('SELECT sign FROM signature where name="%s"',m);
    display(qry2);
    rs2=fetch(exec(conn, qry2));
     alldata2=get(rs2,'Data');
    display(alldata2);

    qry1 = sprintf('SELECT sign FROM sig_master where name="%s"',m);
    display(qry1);
    rs1=fetch(exec(conn, qry1));
     alldata1=get(rs1,'Data');
    display(alldata1);

   % delete(handles.figure1)

 end
 handles.in = alldata2;
 handles.master = alldata1;

I want to take data from handles.in and handles.master and assign them to two variables. This process is to be done when push button2 is pressed. Could you pls help me to do this.

function pushbutton2_Callback(hObject, eventdata, handles)

Answer 1

[Adam]

You need to add

guidata( hObject, handles );

at the end of your pushbutton1_Callback.

Then in pushbutton2_Callback you can access your data again as

handles.in
handles.master

and do whatever you want with them in the scope of pushbutton2's callback.