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ATL Collection Wizard

By , 27 Aug 2000
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  • Download wizard files - 18 Kb
  • Sample Image

    Introduction

    One evening, tired of creating COM collections by hand, I created an object wizard to handle the grunt work for me. This wizard will implement the popular ICollectionOnSTLImpl interface, providing a few enhancements for a collection. The code this wizard writes was inspired by the book "ATL Internals" (Addison-Wesley Pub Co; ISBN: 0201695898). I trust what the authors in that book wrote and haven't stopped to try to understand it all. But nonetheless...on with the wizard.

    Comments

    Sample Image

    You can choose which STL container your collection is based on, as well as the methods your collection will expose beyond the standard-issue methods provided by ICollectionOnSTLImpl. Typically, when I design collections I don't want the user to be able to create the collection themselves. Hence, the "non-creatable" and "unregistered" options. "Unregistered" will simply add the DECLARE_NO_REGISTRY to your collection's CoClass, but the "Non-creatable" option presented a real problem for me while writing this wizard. There is no method exposed by the ATL Object Wizard that allows me to add the proper OBJECT_ENTRY_NON_CREATEABLE macro to the object map. So, when this option is chosen, I throw a bogus value into the OBJECT_ENTRY macro to force a compile error. It is up to the developer to rectify the problem by inserting the proper macro. A cute message box will remind you of this when choosing this option.

    Deficiencies

    • I didn't have time to create an install package for everyone to use, so the installation is manual but straight-forward. Simply copy everything but the *.dll into your "<DevStudioDirectory>\Common\MSDev98\Template\ATL" directory, and then copy and register the *.dll anywhere you'd like. Next time you run the ATL Object Wizard, you'll be able to create a collection based on what I've written.
    • Beneath all of the typedefs and Impls is the collection's workhorse, IEnumVARIANT. Some developers might wish to use a different IEnumXXX, so they'll have to alter the code manually.
    • This wizard doesn't support the stl::map container. It will in the future.
    • You MUST compile the IDL file at least once before using this wizard. This is because the wizard uses the project's typelib to discover the COM objects that the collection can contain.

    License

    This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

    A list of licenses authors might use can be found here

    About the Author

    David Peterson

    United States United States
    No Biography provided

    Comments and Discussions

     
    GeneralOk PinmemberVitaly Tomilov3-May-10 7:24 
    GeneralFantastic Wizard... Just a couple of updates to the distribution file collection.h (changes in bold) For use at your own risk! ;-) PinmemberParko13-Apr-08 23:32 
    QuestionHow to add outlook COM add-in Pinmemberramakrishnakadamati13-Jun-07 18:09 
    QuestionSorting? PinmemberGary Chapman16-Feb-07 23:17 
    AnswerRe: Sorting? PinmemberDirty Highlander14-May-07 5:38 
    GeneralExcelent PinmemberVider6-Sep-06 23:32 
    GeneralRe: Excelent PinmemberPortatofe2-Oct-08 5:19 
    QuestionHow to use the wizard with visual studio 7? PinmemberAverageJoe11-May-06 22:43 
    GeneralOLE Excel PinmemberPham van hoi13-Aug-05 1:12 
    GeneralMFC Pinmembersanpee4-May-05 0:50 
    Generalneed help PinsussAnonymous27-Sep-04 22:46 
    GeneralFantastic, Just what I needed! PinmemberParko19-Aug-04 0:55 
    GeneralIntellisense Pinmemberqur24-Feb-04 19:25 
    GeneralGreat Job - One small problem PinmemberMick O'Neill23-Mar-03 18:41 
    GeneralGood Job!!! PinmemberBleuBleu30-Jan-02 7:10 
    Generalhmmm Pinmembersavaisan16-Dec-01 4:47 
    GeneralAnother small bug .. in COLLECTION.H PinmemberDavid Patrick30-Oct-01 10:23 
    GeneralSmall but serious bug PinmemberPavlos Touboulidis22-Aug-01 0:37 
    QuestionDon'n you think that, may be better to add "restricted" keyword in idl definition of _NewEnum? PinmemberSergey Anisimov1-Jun-01 4:21 
    QuestionHow do I get COM objects into this collection ? PinmemberNicA16-May-01 6:14 
    AnswerRe: How do I get COM objects into this collection ? PinmemberTom Mason24-May-01 23:39 
    GeneralRe: How do I get COM objects into this collection ? PinmemberNicA28-May-01 23:49 
    GeneralRe: How do I get COM objects into this collection ? PinmemberTom Mason29-May-01 0:33 
    AnswerRe: How do I get COM objects into this collection ? PinmemberIvan1410-Aug-01 2:20 
    GeneralWizard support for stl::map container PinmemberGerald Hackenberg15-May-01 3:01 

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