access a callback from a different m file

Hi, I have two *.m file and to ease thing up and have less code in one of the m files I was wondering if I could access a callback in the other m file eg:

 test1file.m
  callback1
  callback2
   access callback2 in test2file.m
  callback3

 test2file.m
  callback1
  callback2
   access this callback from callback2 in test1file.m
  callback3

is this possible? I could copy the code from test2file.m callback2 but I'm trying to limit the amount of code.

Thank you

[Vincent I]

Solved my problem by following jonxon's advice( http://stackoverflow.com/questions/5346635/how-to-pass-parameters-to-a-matlab-gui-file ):

"I would do like this (assuming you're using the GUI builder GUIDE).

Let's say that your figures/m-files are named firstFigure.fig/m and secondFigure.fig/m. In the code of firstFigure, just call secondFigure and pass your parameters as arguments:

 someNumber = 1;
 someText = 'test';
 aMatrix = rand(3);

 secondFigure(someNumber, someText, aMatrix);

The arguments will be available to secondFigure as a variable varargin in the callback functions

 function varargout = secondFigure(varargin) and

function secondFigure_OpeningFcn(hObject, eventdata, handles, varargin)varagin is a cell structure; use cell2mat and char to convert it back:

 theNumber = cell2mat(varargin(1));
 theText = char(varargin(2));
 theTextAgain = cell2mat(varargin(2));
 theMatrix = cell2mat(varargin(3));"