April 2015
Intermediate to advanced
1152 pages
34h 18m
English
Content preview from AutoCAD Platform Customization: User Interface, AutoLISP, VBA, and BeyondBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Storing and Retrieving Custom Data
There are times when it would be nice to have a custom program store values and then retrieve them at a later time. Although you can use a global variable to temporarily store a value while the custom program remains in memory, global variables do not persist across multiple sessions. Using the AutoCAD® Object library and VBA, you can store values so that they persist between drawing or AutoCAD sessions.
If you want a value to be available when a drawing is open, you can use extended data (Xdata) or a custom dictionary. (I introduced the use of dictionaries in Chapter 29, “Annotating Objects,” and how they are ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.