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I have a macro in LO BASIC that sets up a dialog, then, instead of executing it, I do:


This dialog box contains a progress bar and, while testing it, I realized it's frustrating for 
longer documents to have a progress bar and force me to sit and wait without a way to cancel it.  
So I added a Cancel button.

This dialog is in my library and I'd like to find a way to set up the "Cancel" button so it can 
either stop the script or possibly even call a clean up routine when it's been pressed - or have it 
change the state of a global variable so a routine could see if it's been pressed.

I know there are event handlers so I can do something on events like MouseOver and so on.

And if I were not putting this in a library, I could easily specify, in the Dialog Settings, which 
routine to call on Cancel.

But if I want the dialog in a library, is there a way, when calling the function that sets it up, 
to specify a routine to call when the Cancel button is pressed?  Or is there some way to create a 
global variable or any kind of flag that I could have changed when the button is pressed?

In other words, other than putting in a "Stop" command, or specifying one routine name to call when 
an event triggers it, can I pass on the name or pointer to a routine that would be called when the 
button is pressed?

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