I am trying to write an Excel DLL for a function using Visual Studio
in C/Visual C++ that can be called from a worksheet cell.

This function would do something very similar to the built-in VLOOKU
function except that, the user can specify which occurrance of the loo
up value to find rather than always the first - as is the case with th
built-in lookup functions. Further, the user would also be able t
specify the column number where the lookup should be searched rathe
than this always being the first. I don't want to do this using VB
Excel - it is very slow that way particularly when the search array i
big.

In essence, I am looking for some help to be able to do to pass a
Excel range or a VBA (Excel) array to the DLL function and to be abl
to return the cell from the dll function . Whilst I know how to retur
the address from C, I don't know how to translate that memory addres
to Excel cell addresses.


Deepak Agarwa

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