Digital Workshop

Hello,
I am working on a presentation, part of which is to demonstrate a simple stock management system. I know I could use 'doc view' and go off into Excel and make my life easier, but I would like to keep it within OPUS so that I can make it look 'sexier' and also improve my knowledge of this software.
At base level I have three text input boxes, A, B and C, where A = A stock holding figure, B = Actual stock and C = An order quantity generated based on A - B.
I found an example on here yesterday which multiplied the value in one text box by the value in another and printed the result in a third. I adapted this and it worked well using 'Set Variable to Expression'. However, I would quite like to know how to script this, as I am getting into scripting now, and I would also like the value that appears in C to show as a result of entering a figure in B and then pressing 'enter' so that the cursor does not appear, and stay, in box C (as happens at present).
My hope is that if I can get my head around how this simple(?) bit works, I can adapt it to some of the more complex components I want to demonstrate.
Many thanks in advance for any forthcoming assistance.

John,

Please take a look at the attached example, this should help you on your way. When displaying a result it is best to create a standard text object, not a text input box to display the data.
Create a standard text object and then with the cursor flashing in the text object right mouse click on the text object and select insert Variable or Expression from the drop down menu.

Hope this helps

Regards

Brenden Knifton

Brendan,
Thank you very much. I knew that 'unlocking' the principal of this was all that was needed and it works a treat. It has also opened up other possibilities. I have only used script so far to move graphical objects around as I am not particularly mathematical, but within an hour I was getting buttons to trigger multi-arithmetic functions and all sorts! Great stuff.