set handles value to another variable name

hi, I am selecting a variable value from popup menu and I want to use it in different function, for example:

handles.V=20;

then I need to set it to a value, I can't get the reading, for example:

V=handles.V;

I need to use the variable V to do some calculation. please help.

Answer 1

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F