http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Wed, 13 May 2026 20:06:36 +0000 Mon, 03 Jan 2005 12:38:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=1616 http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ http://forum.codejock.com/forum_posts.asp?TID=1616&PID=4592&title=late-binding#4592 Author: amorton
Subject: 1616
Posted: 03 January 2005 at 12:38pm

I've been working with these controls for about 2 weeks now and first off they look great.

But i have just worked out that the controls and objects only havedispatch interfaces defined, so they can only be late bound. So the VBcompiler cannot check for correctness when working with these controls.

There is no way i can compile and ship quality code if the compileris unable to guarantee code will at least execute. This is one of the thingscompilers do, make sure the code will run. If there is a way to get thevb compiler to check against disp interfaces please let me know.

I discovered this because i was getting runtime errors that should havebeen detected by the compiler. So I used ole view from visual studio 6to look at the type lib for the report and command bar controls. Itshows that all interfaces are defined as dispinterface .

If I examine the type lib for the ocx from the competitor control i used to use theirinterfaces are defined as "interface", derived from IDispatch and markedas "dual" so they can be used by late and early binding. So thecompiler can ensure the code will work.

This is a serious floor in the controls. I need to be able to deliver aproduct used by hundreds of people in a broadcast media company wherereliability is all important. But I now fear i cannot deliver thatlevel of quality using your controls without a large additional testingeffort to ensure that all lines of code that use your controls areexecuted. This is normally what the compiler does, using your controlsi need to get a person to do.

These controls look great and do some amazing things but thepoor documentation means it takes longer than it should to work out how theywork. And the lack of compile timechecking puts them in the same league as old fashion ASP for shipping quality product.

Can someone please let me know if the proposed release at the end ofJanuary will include dual interfaces so the compiler can check the code.

thanks
aaron
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