Thanks for the response!

But does this mean, that without a third-party product,
it is not possible to write a "managed udf" ?!?!?!?

BTW: the product you suggested is not really cheap...

-----Original Message-----
"Thomas Mutzl"
wrote
Is it possible (and HOW?) to write a user defined
(=custom) function in managed code??

Have a look at http://ManagedXLL.net/ where the answer
would look like this:

using ManagedXLL;

[WorksheetFunction]
public static int Test(int x)
{
return x*x;
}

Jens.


.