April 2002
Intermediate to advanced
440 pages
12h 37m
English
Content preview from Programming Visual Basic for the Palm OSBecome 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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Main Features of AppForge
Before we get down to installing AppForge, let’s review the versions of the product. First of all, AppForge supports multiple handheld platforms: the Palm Computing Platform and the Microsoft Pocket PC. In this book, we are only going to cover AppForge for the Palm OS. AppForge for the Palm comes in two flavors: Personal and Professional. We’ll look at what comes with each edition, and how each is different.
Both editions ship with the
AppForge Visual
Basic add-in, which is the compiler.[1] Like Microsoft VB, compiled AppForge
programs on the Palm require a runtime component to
function—the Booster. This is the equivalent of
Msvbvm60.dll, the Microsoft VB Runtime. The
Booster
for Palm OS is freely available for
download and redistribution from the AppForge Web site.[2]
There are costs and benefits associated with the use of the AppForge Booster:
- Execution speed
Calling into another layer of code can impact performance. The performance penalty on a Windows machine is trivial, but it can be significant on the low-powered Palm PDA.
- Code size
The Booster is large—more than 350 KB of memory. Even though 8 MB of memory is more common now, this is still a big amount.
- Shared code
If more than one AppForge application is installed on the Palm PDA, then there is an advantage to using the Booster, because library and common code is not duplicated between applications.
- Maintenance
Bug fixes to the common functions in the Booster need only be distributed once to patch ...
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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.
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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.