Excel dynamic argument count

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Excel dynamic argument count
Thomas Horstmann

Posts: 11
Joined: 2020-08-24
is there a way to define Excel UDF functions with "dynamic" argument count?

Somthing like (Excel sample):

// 3 parameters

// 5 parameters
Posted 28 Aug, 2020 01:40:14 Top
Andrei Smolin

Add-in Express team

Posts: 17630
Joined: 2006-05-11
Hello Thomas,

Excel doesn't support this.

The user is able to provide only certain arguments to a function. Accordingly, you should be prepared to this.

Regards from Belarus (GMT+3),

Andrei Smolin
Add-in Express Team Leader
Posted 28 Aug, 2020 03:50:50 Top
Thomas Horstmann

Posts: 11
Joined: 2020-08-24
Maybe "dynamic" is the wrong wording. Is it possible to make a parameter "optional" with a default value. Like Excel sum function.
Posted 29 Aug, 2020 04:57:12 Top
Dmitry Kostochko

Add-in Express team

Posts: 2865
Joined: 2004-04-05
Hi Thomas,

It is possible to make a parameter optional, you can do this in the Type Library editor. I have created a small demo project for you:

As for default values, the Type Library editor allows adding default values for parameters, but I have never tested this.
Posted 01 Sep, 2020 03:02:23 Top