Try googling for Excel Automation

Automation is a term associated with using one platform from within another.

"Annonymous Coward" wrote:

I am a C++ programmer and have experience writing Win32 DLLs. I want to
learn how to write XLLs, so I can interface my Win32 Dll code more
closely to Excel.

E.g.
1). Pass Excel data directly to my library
2). Write data directly to Excel sheets, from my library
et, etc ...


Anyone know of good tutorials to get me started?