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  1. #1
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    using xll (97 - 2003)

    I would like to hear the thoughts of others about the use of XLLs over COM addins or in the case of Office 2003 in place of .NET office components. I feel XLLs and WLLS should not be used in widely distrubuted Excel or Word based applications because one it appears MS does not support these any longer, C++ is not an easy language to develop addins in, and there isn't much documentation on their use for developers to reference.

  2. #2
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    Re: using xll (97 - 2003)

    I would advise you to consider buying this book.

    1. It is the very best book on Excel development ever written (IMO)
    2. It contains a chapter on each of the subjects you mention with comments on what to use in which situation.
    Jan Karel Pieterse
    Microsoft Excel MVP, WMVP
    www.jkp-ads.com
    Professional Office Developers Association

  3. #3
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    Re: using xll (97 - 2003)

    In particular, VBA functions can have a serious speed penalty, whereas C++ functions are as fast as Excel's built-in functions

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