Break Out of While Loop with ESC key

Hi I want something like below.

while(see if esc key is pressed)
    reading serial port;
    writing to another serial port;
end
code;
code;
fclose(serialports);

where the while loop continues to execute until the escape key is pressed. Currently i am doing it with while(1). but when i have to end the program i have to press ctrl+c. Which terminates the program and the code where the ports are to be closed is not executed. So i want to get out of the while loop when escape is pressed and the code below the while loop is also executed.

Answer 1

[Jan]

What about a small GUI?

DlgH = figure;
H = uicontrol('Style', 'PushButton', ...
                    'String', 'Break', ...
                    'Callback', 'delete(gcbf)');
while (ishandle(H))
   disp(clock);
   pause(0.5);
end

[Amjad]

Thanks for the answer. It does meet the requirement.

Answer 2

[Walter Roberson]

With respect to cleanup on control-c: see onCleanup()

[Amjad]

Yes it will clean up the variables at least. but i think the stop process button would be more feasible then ctrl+c.