How to pause, resume and abort a GUI from another GUI?

I have created a GUI using GUIDE. It has a lot of pushbuttons and hence a lot of callback functions. When I am in one particular callback, I want to load another GUI figure with 3 buttons: Pause, Resume and Abort.I have created the 2 GUIs with the names main.m and PauseResAbort.m .In the callback for the pause button (in the PauseResAbort file), I have written: waitfor(handles.resume,'value',1); where, resume is the Resume Button. But this does not pause the main GUI. Moreover, I am not running a loop. So, I cannot figure out any other way to pause the program.

Thanks in advance for any help.

[Hari]

what u r running in main gui? sorry question is not clear..........