Hi,

Since XLL in C API is an old technology.
Currently we have many new extensions for Office production.
e.g. Excel Automation with any COM ready language(C++/VB/.NET), VSTO
216686 How To Automate Excel From C++ Without Using MFC or #import
http://support.microsoft.com/default...b;EN-US;216686

196135 How To Create an Automation Client Project Using ATL
http://support.microsoft.com/default...b;EN-US;196135

238972 INFO: Using Visual C++ to Automate Office
http://support.microsoft.com/default...b;EN-US;238972

If you have any other concern, please let me know.




Best regards,

Perter Huang
Microsoft Online Partner Support

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