Thread problem

[Frank Benoit]

sleek schrieb:
> I'm trying to manipulate the text on a button in my shell, but no matter 
> what I try, I continue to get:
> 
> object.Exception: Access Violation
> 
> The code I'm attempting to run is attached. Can anyone take a look and shed 
> some light on what I'm doing wrong? Thanks! 
> 
> 

The documentation of SWT says for most widgets:
IMPORTANT: This class is not intended to be subclassed.

So do not subclass Shell, instead use it as a member variable.

But the access violation is caused by accessing a local variable from 
your startStopButton selection listener. The initComponents method is 
finished long before the listener is called. So the "startStopButton" 
variable do no more exist. Make this variable a member var of the 
MainWindow class.