Just adding to what Stephen has said, I don't think you can hook a
commandbutton's events in .NET without Visual Studio Tools for Office.
VSTO provides many accessor methods (e.g. get_Range) to deal with the
problem of C# not supporting parameterized properties (that why you're
using Value2, right?)

If you don't have VSTO available to you, you'll probably want to start
using a lot of hyperlinks because the SheetFollowHyperlink is the most
useful event! See that following article MSDN for lots of non-VSTO C#
code:

Understanding the Excel Object Model from a .NET Developer's
Perspective:

http://msdn.microsoft.com/vstudio/of...l/excelobj.asp

--

Stephen Bullen wrote in message ...
Hi Harald,

I'm trying to develop en application in Vusial Studio (C#)
towards excel. But I cannot get anything to work. Trying
to find a object (a command button) or even outputting
text to cell (rng.Value2("Hello world");) throws an
exception.

The exception have the message: HRESULT: 0x800A03EC.

What is wrong? I cannot find any information out there
that helps.

If you go to msdn.microsoft.com and search for 'Visual Studio Tools for
Office', you should find lots of c# examples that might help.

Regards

Stephen Bullen
Microsoft MVP - Excel
www.BMSLtd.co.uk