TweetFollow Us on Twitter

IAC Toolkit
Volume Number:7
Issue Number:5
Column TagTools of the Trade

IAC with UserLand's Toolkit

By Dave Kelly, MacTutor Editorial Staff

Perhaps you have heard about interapplication communication. First, look at the way most applications communicate. This investigation will turn out to be an analysis of the evolution of the Macintosh. Up to now communications between applications have been done by the “Export-Import” method. That is, data is exported from the first application to the clipboard or an external file and then pasted or imported into the second application. This method usually requires a user to “baby-sit” the operation. Cut and paste operations don’t make any assumptions about what application is doing the paste and passes on very little knowledge of where the data came from. At most, all that is known is the type of data that is being pasted (TEXT, PICT, etc.).

Of course, ingenious utilities such as QuicKeys and MacroMaker can “automate” some of these operations. These macro utilities have been a great help, but can’t possibly do everything. They extend applications to make them appear to have more features.

Applications running with MultiFinder have had a slight edge up to now when it comes to communicating with each other. A few companies have come up with their own system of communication between applications. For example, you can link data in MS Word to data in MS Excel and changes in the data are reflected in the linked application. There are other “integrated” software packages available. These “custom” applications are designed to work with each other. The problem is that they don’t work outside the set of integrated applications.

With MultiFinder the user can load two or more applications into memory at once, but the only thing that is stopping the applications from talking to one another is the lack of a little bit of software to hook them up. Have you ever written an application and wanted to add the text processing capabilities of MS Word, the communications capabilities of AppleLink and drawing tools of MacDraw II? Since it usually isn’t so smart to “reinvent the wheel”, wouldn’t it be good if you could link you favorite applications together to have the best of all worlds?

The idea of IAC is much more than integrating applications. IAC gives applications the power to ask other applications to perform tasks for them and then return the results. The user can combine the features of several different programs to create new functionality that would otherwise be unavailable. It may help to imagine that you are adding a scripting system to your application. Scripts sent to other applications could look in menus and dialog boxes and assume full control over another application. The difficulty is that IAC must be implemented in the client and server applications before any intercommunication can take place.

Until now the only form of IAC was in custom programs that only talked to each other. System 7.0 defines a common method for applications to communicate. Apple calls it AppleEvents. AppleEvents are only available under system 7.0, which brings up a complication for developers that want their applications to support both System 6.0 and 7.0. There are still many 1 Meg Macintosh systems in use that will still be running 6.0 systems for some time to come.

In January (1991) a new software company called UserLand Software, Inc. released new software support for IAC. The company has been quiet until last November when they disclosed their development of the UserLand IAC Toolkit that first shipped on December 31st. There are several advantages with working with UserLand IAC Toolkit. In particular your application can communicate using System 6.0 or System 7.0 and possibly future operating systems in the future. There are implications that IAC will be available for MS-DOS, Windows, or Unix. The IAC Toolkit was designed so that your application can be driven by a user scripting system. The main advantage is that the toolkit provides an IAC environment that is not biased toward any one platform, yet provides one that will be supported on major platforms like System 7.0.

The Toolkit is simpler to use than AppleEvents (System 7.0). The manual is an indication of this simplicity. The introduction gives a thorough overview of IAC and some real examples of how it could be used. The step by step installation tells what files will be used for using the Toolkit with THINK C version 4.0 or MPW C 3.1 or later. When using system 6.0 the UserLand INIT is required to be installed in your system folder. Next, four sample programs are provided with source code so you can see how it’s done. Implementation of the Toolkit with your projects is presented in a detailed format that shows how to add IAC capability to your applications. The last half of the 71 page manual is a complete reference of the UserLand IAC Toolkit library. If you become familiar with the manual, you should have no problem implementing UserLand IAC. The IAC toolkit adds about 12K to the size of you program. That’s not counting the UserLand INIT that takes about 6K.

Before you get started writing your IAC applications, you should be aware of some costs of IAC. Implementation of UserLand IAC comes at the reasonable price of $395 (retail price, street prices are possibly lower). Distributing IAC using UserLand IAC Toolkit will require that you get a distribution license from UserLand Software before shipping. The cost is $4000 for a fully-paid, royalty-free license to include the Toolkit with as many of your company’s applications as you like. If that doesn’t sound bad enough, they put a 5 year term on the license so that in 1995 you’ll have to renew the license or a new one for a more powerful product that 1995 may produce. When you purchase the distribution license, UserLand will deliver the complete C source code so you can support IAC better especially as Apple introduces new hardware and system software.

The license fee sounds excessive, but in the price UserLand has taken into account their development expenses, developer needs, and future development of cross-platform and network-aware versions In addition, they provide excellent product support by getting involved with IAC developers without an additional charge for support. You’ll need to evaluate the pros and cons vs. cost to decide if the toolkit is the way for you to go. Keep in mind that there will be a bit more of a learning curve to implement AppleEvent IAC for system 7.0. than to implement UserLand IAC. If you’re a small developer and feel that the license is too excessive, you may want to negotiate a “technology exchange” with UserLand, if you have any technology to exchange.

In contrast, other “toolkits” have a much less costly license agreement. Many products such as the Programmer’s Extender and the Extender DialogHandler from Invention Software allow you to distribute freely and/or market programs that use their toolbox if no portions of the source code library, user manuals or other documentation is distributed. UserLand should review their license policy to encourage more small developers to want to use it. I might suggest a license with limited support or without the source code for small developers. It’s too bad, but UserLand’s license was designed for larger commercial and in-house developers. The small struggling developers just have to pay the price like everybody else. Remember, you can still work with the toolkit for the $395 price and don’t have to license your product until it ships. If your product is worth it’s weight, you should be able to come up with the license fee. Dave Winer, President of UserLand puts it this way: “We’ve put a lot of thought into the pricing of this product. If it’s out of reach for some developers, and they don’t have any technology they want to exchange, so be it. We hope at least those developers will consider putting System 7.0 AppleEvents into their products. We believe IAC is worth doing even if it’s only for System 7.0, and even if the developer has to do more work than absolutely necessary. On the other hand, we think that any developer who passes on UserLand IAC Toolkit is being penny-wise and pound-foolish, and missing a great opportunity to make their software more useful and more competitive.”

In summary, the UserLand IAC Toolkit provides support for IAC in System 6.0 not available elsewhere. It has been designed to support multi-platforms including System 7.0. You need the toolkit if you want IAC support in both System 6.0 and 7.0. Although the Userland toolkit is easier to use, the cost to license it for distribution may be a trade off for the time it takes to develop a similar IAC application using System 7.0 AppleEvents. You’ll have to be the judge of that. The toolkit doesn’t support other languages except C at this time.

Userland Software, Inc.

490 California Avenue

Palo Alto, CA. 94306

Phone: 415 325-5700

FAX 415-325-9829

AppleLink USERLAND.DTS

Price: $395 + $4000 license fee (5 year term) to distribute applications that use the Userland IAC Toolkit.

Requires: THINK C version 4.0 or later or MPW C 3.1 or later; a Macintosh computer with at least 2MB RAM, running MultiFinder, System 6.X or System 7.X; a hard disk.

OTHER STUFF

calenDAr™ from Psybron Systems is not just a calendar DA, but is a calendar with fully programmable alarms. If you didn’t think LifeGuard would provide enough for you (March 1991 MacTutor, p.79), calenDAr may provide similar reminders for you. It doesn’t count keystrokes for you, but you can have calenDAr remind you with either a sound and/or a message dialog on periodic intervals or on a one time basis. It’s set up to record new sounds or audio messages for you with MacRecorder or the built in sound support of the Macintosh LC or SI.

The calendar correctly displays calendars for months between January 1583 (the first month of the first full year in which the Gregorian calendar was used) through December 99,999. All major US, Canadian and Jewish holidays are displayed for every year as well as other special dates such as beginning of spring, summer, fall, and winter.

Psybron Systems says that calculating the dates of holidays like Hanukkah and Easter aren’t as easy as it might seem, but calenDAr does an excellent job of it. It’s a spiffy little DA that you might find useful.

Psybron Systems, Inc.

1116 Smith Street Suite 206

Post Office Box 431

Charleston, WV. 25322-0431

(304) 340-4260 or (800) 866-4260

FAX: (304) 345-3312

Price: $49.95 plus shipping.

Update on bugs that were reported in the Programmer’s Assistants from Aladdin Systems: The Bystander bug has been corrected. It was a memory management problem. All of the DAs are being updated to support System 7.0.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Apple iOS 10.2.1 - The latest version of...
iOS 10 is the biggest release of iOS ever. A massive update to Messages brings the power of the App Store to your conversations and makes messaging more personal than ever. Find your route with... Read more
Apple Security Update 2016-003 Supplemen...
Apple Security Update is recommended for all users and improves the security of OS X. For detailed information about the security content of this update, please visit: http://support.apple.com/kb/... Read more
Apple macOS Sierra 10.12.3 - The latest...
With Apple macOS Sierra, Siri makes its debut on Mac, with new features designed just for the desktop. Your Mac works with iCloud and your Apple devices in smart new ways, and intelligent... Read more
BetterTouchTool 1.992 - Customize Multi-...
BetterTouchTool adds many new, fully customizable gestures to the Magic Mouse, Multi-Touch MacBook trackpad, and Magic Trackpad. These gestures are customizable: Magic Mouse: Pinch in / out (zoom... Read more
Viber 6.5.5 - Send messages and make cal...
Viber lets you send free messages and make free calls to other Viber users, on any device and network, in any country! Viber syncs your contacts, messages and call history with your mobile device, so... Read more
Opera 42.0.2393.137 - High-performance W...
Opera is a fast and secure browser trusted by millions of users. With the intuitive interface, Speed Dial and visual bookmarks for organizing favorite sites, news feature with fresh, relevant content... Read more
iClock Pro 3.4.7 - Customize your menuba...
iClock Pro is a menu bar replacement clock for Apple's default clock. iClock Pro is an update, total rewrite and improvement to the popular iClock. Have the day, date and time in different fonts and... Read more
PhotoDesk 4.1.5 - Instagram client for p...
PhotoDesk lets you view, like, comment, and download Instagram pictures/videos. (NO Uploads! / Image Posting! Instagram forbids that! AND you need an existing Instagram account). But you can do so... Read more
Capo 3.5.1 - Slow down and learn to play...
Capo lets you slow down your favorite songs so you can hear the notes and learn how they are played. With Capo, you can quickly tab out your songs atop a highly-detailed OpenCL-powered spectrogram... Read more
HandBrake 1.0.2 - Versatile video encode...
HandBrake is a tool for converting video from nearly any format to a selection of modern, widely supported codecs. Features Supported Sources VIDEO_TS folder, DVD image or real DVD (unencrypted... Read more

Collect pets and sling arrows in Arcane...
Mobile gaming is a crowded market, but regular updates are a good way to keep us attention-short players keen. The brand new content in Arcane Online is a prime example. Published by Japanese developer Gala, Arcane Online is a fantasy MMO that... | Read more »
Super Mario Run dashes onto Android in M...
Super Mario Run was one of the biggest mobile launches in 2016 before it was met with a lukewarm response by many. While the game itself plays a treat, it's pretty hard to swallow the steep price for the full game. With that said, Android users... | Read more »
WarFriends Beginner's Guide: How to...
Chillingo's new game, WarFriends, is finally available world wide, and so far it's a refreshing change from common mobile game trends. The game's a mix of tower defense, third person shooter, and collectible card game. There's a lot to unpack here... | Read more »
Super Gridland (Entertainment)
Super Gridland 1.0 Device: iOS Universal Category: Entertainment Price: $1.99, Version: 1.0 (iTunes) Description: Match. Build. Survive. "exquisitely tuned" - Rock Paper Shotgun No in-app purches, and no ads! | Read more »
Red's Kingdom (Games)
Red's Kingdom 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Mad King Mac has kidnapped your father and stolen your golden nut! Solve puzzles and battle goons as you explore and battle your... | Read more »
Turbo League Guide: How to tame the cont...
| Read more »
Fire Emblem: Heroes coming to Google Pla...
Nintendo gave us our first look at Fire Emblem: Heroes, the upcoming mobile Fire Emblem game the company hinted at last year. Revealed at the Fire Emblem Direct event held today, the game will condense the series' tactical RPG combat into bite-... | Read more »
ReSlice (Music)
ReSlice 1.0 Device: iOS Universal Category: Music Price: $9.99, Version: 1.0 (iTunes) Description: Audio Slice Machine Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or... | Read more »
Stickman Surfer rides in with the tide t...
Stickson is back and this time he's taken up yet another extreme sport - surfing. Stickman Surfer is out this Thursday on both iOS and Android, so if you've been following the other Stickman adventures, you might be interested in picking this one... | Read more »
Z-Exemplar (Games)
Z-Exemplar 1.4 Device: iOS Universal Category: Games Price: $3.99, Version: 1.4 (iTunes) Description: | Read more »

Price Scanner via MacPrices.net

Deal alert! 13-inch 2.0GHz MacBook Pros for $...
B&H Photo has the new 2016 13″ 2.0GHz non-Touch Bar MacBook Pros in stock today and on sale for $225 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro... Read more
Free LibreOffice Portable 5.2.4 Complete Offi...
PortableApps.com and The Document Foundation have announce the release of LibreOffice Portable 5.2.4. LibreOffice Portable is an Open Source full-featured office suite — including a word processor,... Read more
Apple Planning Three New Tablets For 2017 – D...
Digitimes’ Rebecca Kuo and Joseph Tsai say that unnamed insider sources report Apple having three new tablets in the pipeline for 2017 release: a 9.7-inch model with a friendly price range, a new mid... Read more
Roundup of 15-inch Touch Bar MacBook Pro sale...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Apple refurbished iPad Pros available for up...
Apple has Certified Refurbished 9″ and 12″ Apple iPad Pros available for up to $160 off the cost of new iPads. An Apple one-year warranty is included with each model, and shipping is free: - 32GB 9″... Read more
16GB iPad Air 2, Apple refurbished, available...
Apple has Certified Refurbished 16GB iPad Air 2s available for $319 including free shipping. A standard Apple one-year is included. Their price is $60 off original MSRP for this model. Read more
Apple iMacs on sale for up to $120 off MSRP
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $120 off MSRP, each including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2199 $100 off MSRP - 27″ 3.2GHz/1TB Fusion iMac... Read more
Apple refurbished Apple TVs available for up...
Apple has Certified Refurbished 32GB and 64GB Apple TVs available for up to $30 off the cost of new models. Apple’s standard one-year warranty is included with each model, and shipping is free: -... Read more
Save up to $350 with Apple Certified Refurbis...
Apple has Certified Refurbished 2015 21″ & 27″ iMacs available for up to $350 off MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: - 21″ 3.... Read more
2015 12-inch Retina MacBooks, Apple refurbish...
Apple has Certified Refurbished 2015 12″ Retina MacBooks available for up to $410 off original MSRP. Apple will include a standard one-year warranty with each MacBook, and shipping is free. The... Read more

Jobs Board

*Apple* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Stamford, CT We have immediate job openings for several Desktop Support Technicians with one of our most well-known Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Site Security Manager - Apple (Unite...
# Apple Site Security Manager Job Number: 54692472 Culver City, California, United States Posted: Jan. 19, 2017 Weekly Hours: 40.00 **Job Summary** The Apple Read more
*Apple* macOS Systems Integration Administra...
…most exceptional support available in the industry. SCI is seeking an Junior Apple macOS systems integration administrator that will be responsible for providing Read more
*Apple* Retail - Multiple Positions- Deer Pa...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.