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Excel Automation from C# (2005): COUPDAYBS


I've written a small piece of code to pass a formula to Excel 2003,
start a calculation, receive the value back und show it in my C#
(.Net2005) WinForm. Works fine so far.

The other day I wanted to pass the following formula to my app:
"COUPDAYBS( DATE(2007;1;25); DATE(2008;11;15); 2; 1 )". This is not
working. I always receive a number like "-2146826259", which in fact
is wrong. The correct result would be 71.

Tried this in Excel itself and discovered that I need to switch on the
"Analyse-Funktionen" AddIn from Extras|Add-Ins (first add in in the

How can I switch it on from within C#.

Any hint is highly appreciated!


Jun 27 '08 #1
0 932

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